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Percentages 2: Calculating How Much Of A Grid Is
Shaded
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How To Do KS2 Maths SATs Type Questions
(Paper B – Calculator Allowed)
In a SATs Paper B you might be asked to work out what percentage of a grid is shaded:
For example: Here is a grid of 20 tiles. What percentage of the tiles are shaded blue?
Firstly count up the number of shaded tiles:
For example: Here is a grid of 20 tiles. What percentage of the tiles are shaded blue?
Firstly count up the number of shaded tiles:There are 6
For example: Here is a grid of 20 tiles. What percentage of the tiles are shaded blue?
Firstly count up the number of shaded tiles:There are 6As a fraction: 6/20 of the grid is shaded
For example: Here is a grid of 20 tiles. What percentage of the tiles are shaded blue?
Now convert 6/20 to a fraction with a denominator of 100
For example: Here is a grid of 20 tiles. What percentage of the tiles are shaded blue?
Now convert 6/20 to a fraction with a denominator of 100
620
=
X 5
For example: Here is a grid of 20 tiles. What percentage of the tiles are shaded blue?
Now convert 6/20 to a fraction with a denominator of 100
620 100
=
X 5
For example: Here is a grid of 20 tiles. What percentage of the tiles are shaded blue?
Now convert 6/20 to a fraction with a denominator of 100
620 100
=X 5
X 5
For example: Here is a grid of 20 tiles. What percentage of the tiles are shaded blue?
Now convert 6/20 to a fraction with a denominator of 100
620
30100
=X 5
X 5
For example: Here is a grid of 20 tiles. What percentage of the tiles are shaded blue?
This fraction can then be converted directly to a %
620
30100
=X 5
X 5
For example: Here is a grid of 20 tiles. What percentage of the tiles are shaded blue?
This fraction can then be converted directly to a %
620
30100
=X 5
X 5
= 30%
Another example: Here is a pattern on a grid. What percentage of the tiles are shaded green?
Another example: Here is a pattern on a grid. What percentage of the tiles are shaded green?
Firstly count up the total number of tiles.
Another example: Here is a pattern on a grid. What percentage of the tiles are shaded green?
Firstly count up the total number of tiles. There are 50.
Another example: Here is a pattern on a grid. What percentage of the tiles are shaded green?
Firstly count up the total number of tiles. There are 50.Then count up the number of tiles that are shaded green.
Another example: Here is a pattern on a grid. What percentage of the tiles are shaded green?
Firstly count up the total number of tiles. There are 50.Then count up the number of tiles that are shaded green.There are 14
Another example: Here is a pattern on a grid. What percentage of the tiles are shaded green?
Firstly count up the total number of tiles. There are 50.Then count up the number of tiles that are shaded green.There are 14As a fraction, this is written as 14/50
Another example: Here is a pattern on a grid. What percentage of the tiles are shaded green?
Now convert 14/50 to a fraction with a denominator of 100
Another example: Here is a pattern on a grid. What percentage of the tiles are shaded green?
Now convert 14/50 to a fraction with a denominator of 100
1450
=
Another example: Here is a pattern on a grid. What percentage of the tiles are shaded green?
Now convert 14/50 to a fraction with a denominator of 100
1450
=
X 2
Another example: Here is a pattern on a grid. What percentage of the tiles are shaded green?
Now convert 14/50 to a fraction with a denominator of 100
1450 100
=
X 2
Another example: Here is a pattern on a grid. What percentage of the tiles are shaded green?
Now convert 14/50 to a fraction with a denominator of 100
1450 100
=X 2
X 2
Another example: Here is a pattern on a grid. What percentage of the tiles are shaded green?
Now convert 14/50 to a fraction with a denominator of 100
1450
28100
=X 2
X 2
Another example: Here is a pattern on a grid. What percentage of the tiles are shaded green?
This fraction can then be converted directly to a %
1450
28100
=X 2
X 2
Another example: Here is a pattern on a grid. What percentage of the tiles are shaded green?
This fraction can then be converted directly to a %
1450
28100
=X 2
X 2
= 28%
Now try some by yourself. Click to find the correct answer:What percentage of this grid is coloured in white?
Now try some by yourself. Click to find the correct answer:What percentage of this grid is coloured in white?
Now try some by yourself. Click to find the correct answer:What percentage of this grid is coloured in white?
5
2 5
Now try some by yourself. Click to find the correct answer:What percentage of this grid is coloured in white?
5
2 5 1 0 0=
X 4
Now try some by yourself. Click to find the correct answer:What percentage of this grid is coloured in white?
5
2 5 1 0 0
2 0=
X 4
X 4
Now try some by yourself. Click to find the correct answer:What percentage of this grid is coloured in white?
5
2 5 1 0 0
2 0=
X 4
X 4
= 20%
Now try some by yourself. Click to find the correct answer:What percentage of this grid is coloured in pink?
Now try some by yourself. Click to find the correct answer:What percentage of this grid is coloured in pink?
9
2 0
Now try some by yourself. Click to find the correct answer:What percentage of this grid is coloured in pink?
9
2 0 1 0 0=
X 5
Now try some by yourself. Click to find the correct answer:What percentage of this grid is coloured in pink?
9
2 0 1 0 0
4 5 =
X 5
X 5
Now try some by yourself. Click to find the correct answer:What percentage of this grid is coloured in pink?
9
2 0 1 0 0
4 5 =
X 5
X 5
= 45%
Now try some by yourself. Click to find the correct answer:What percentage of this grid is coloured in blue?
Now try some by yourself. Click to find the correct answer:What percentage of this grid is coloured in blue?
7
2 0
Now try some by yourself. Click to find the correct answer:What percentage of this grid is coloured in blue?
7
2 0 1 0 0=
X 5
Now try some by yourself. Click to find the correct answer:What percentage of this grid is coloured in blue?
7
2 0 1 0 0
3 5 =
X 5
X 5
Now try some by yourself. Click to find the correct answer:What percentage of this grid is coloured in blue?
7
2 0 1 0 0
3 5 =
X 5
X 5
= 35%
That’s it for now......for more help with your maths,
try my book:mastering multiplication tables
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