Now we decide to start a new campaign that will help’s our reader who are preparing for Government jobs as well as for Bank jobs . Our team will try to write some very helpful articles related to various shortcut techniques related to the aptitude. Here in this post we will share various shortcut techniques for percentage Shortcut 1: If we increased any value by x % and then decreased by y %. hen the resulting e!ect in percent will be" “+ x + y + xy /100”. Various Examples related to this Percentage Short cuts are given elo!" Example 1: he price of goods is mar#s $ % more than the real price by the shop#eeper. &fter that the shop#eeper allowed a discount of ' %. Now (hat pro)t or loss did the shop#eeper will get* Solution" (e solve this as follow by using the percentage shortcut' as follow" he +oss ,or- ro)t he will get is / $ 0 ' 1 ,1$ -,2' -3' / + #$ %pro&t'. Example (" 4ide of the square is increased by 5 %. 6ind the percentage increase in area. Solution" Here we again use the percentage shortcut '. 4o the increased area percentage / 5 1 5 1 ,5 -,5 -3' / )* $ %increased'. Example " 7adius of the circle is decreased by $ %. (hat will be the percent change in area of the circle* Solution" herefore by using the percentage shortcut1 " he ercent change in area of circle is/ 2 $ 2 $ 1 ,2$ -,2$ -3' / , )$ %decreased' Example -" he price of a car is increased by '8% than after that again decreased by '8%. (hat will be the percent change* Solution" he percent change is / 1 '8 2 '8 1 ,1'8-,2'8-3'/ , (.( $ %decreased' Example " +ength of a rectangle is increased by 9 % and breadth of the rectangle is decreased by 9 %. 6ind change in area. Solution" :y using the formula of percentage shortcut given above" he percent change in area of rectangle is/ 9 2 9 1 ,29 -,19 -3' / 2 1) $% decreased'
This Docx provide you the percentage tricks which will be usefull for solving the apptitude questions easily in compititive exams
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Now we decide to start a new campaign that will helps our reader
who are preparing for Government jobsas well as forBank jobs. Our
team will try to write some very helpful articles related to
various shortcut techniques related to the aptitude. Here in this
post we will share variousshortcut techniques for percentage
Shortcut 1:If we increased any value by x % and then decreased
by y %. Then the resulting effect in percent will be:+ x + y + xy
/100.
Various Examples related to this Percentage Short cuts are given
below:Example 1:The price of goods is marks 20% more than the real
price by the shopkeeper. After that the shopkeeper allowed a
discount of 10%. Now What profit or loss did the shopkeeper will
get?Solution:We solve this as follow by using the percentage
shortcut1 as follow:The Loss (or) Profit he will get is = 20 10 +
(+20)(-10)/100 =+ 8% (profit).
Example 2:Side of the square is increased by 30%. Find the
percentage increase in area.Solution:Here we again use the
percentage shortcut 1.So the increased area percentage = 30 + 30 +
(30)(30)/100 =69 % (increased).
Example 3:Radius of the circle is decreased by 20%. What will be
the percent change in area of the circle?Solution:Therefore by
using thepercentage shortcut1:The Percent change in area of circle
is= - 20 - 20 + (-20)(-20)/100 =-36% (decreased)
Example 4:The price of a car is increased by 15% than after that
again decreased by 15%. What will be the percent
change?Solution:The percent change is = + 15 - 15 + (+15)(-15)/100
=- 2.25 % (decreased)
Example 5:Length of a rectangle is increased by 40% and breadth
of the rectangle is decreased by 40%. Find change in
area.Solution:By using the formula of percentage shortcut given
above:The percent change in area of rectangle is= 40 - 40 +
(-40)(+40)/100 =-16 %( decreased)
