Percentage of a Quantity
A given percentage of quantity = (percentage as a fraction) X quantity
1) Suppose I have to find out the 25 % of 120 =
25 120
---------- X 120 = ---------- = 30 (Ans.)
100 4
2) Suppose I have to find out the 20 % of 180 =
20 180
------------- X 180 = ------------ = 36
100 5
1
3) Suppose I have to find out the 12 --------- % of 200 =
2
First, we would like to convert mixed fraction to simple fraction –
1 25
12 ------- = ---------
2 2
25/2
Now as per the given condition, ------------ X 200
100
25
= ------------ X 200 = 25 (Ans.)
200