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Finding a Percent of a Number
Two methods:
1.) Mental Math- (Only works for some percents)
2.) Multiplication method
Mental Math Finding Percents
50%Write 50% as a fraction in lowest terms.
Find 50% of 150. Find 50% of 240.
To find 50% divide by 2.Trick:
Mental Math Finding Percents
25%Write 25% as a fraction in lowest terms.
Find 25% of 32. Find 25% of 240.
To find 25% divide by 4.Trick:
Mental Math Finding Percents
20%Write 20% as a fraction in lowest terms.
Find 20% of 40. Find 20% of 350.
To find 20% divide by 5.Trick:
Mental Math Finding Percents
10%Write 10% as a fraction in lowest terms.
Find 10% of 50. Find 25% of 240.
To find 10% divide by 10.
Find 10% of 356.
Trick:
Mental Math Finding Percents
5%Write 5% as a fraction in lowest terms.
Find 5% of 80. Find 25% of 240.
To find 5% divide by 20.
Find 5% of 120.
Trick:
Mental Math Finding Percents
1%Write 1% as a fraction in lowest terms.
Find 1% of 70. Find 25% of 240.
To find 1% divide by 100.
Find 1% of 125.
Trick:
Mental Math Finding Percents
33 %Write 33.3% as a fraction in lowest terms.
Find of 51. Find 25% of 240.
To find 33.3% divide by 3.
Find of 126.
Trick:
How could we find 15%?
Find 15% of 60. Find 15% of 42
How could we find 75%?
Find 75% of 400. Find 75% of 60
Hint- "of " means multiplication
Method two: Multiplying decimals
Convert the percent to a decimal and multiply
1.) Find 45% of 40 2.) Find 35% of 500
3.) What is 12% of 43? 4.) Find 80% of 35