Module - 1
The best practice, while solving the problems on percentage is to calculate 50% , 10% and 1%.
Examples :
1. For 500
Ans : For 50% is
50/100 * 500 = 250
For 25% is
25/100 * 500 = 125
For 10% is
10/100 * 500 = 50
For 1% is
1/100 * 500 = 5
Simple ways is
- For 50% , value is divide it by 2
- For 25% , Value is divide it by 4
- For 10% , Value is divide it by 10
- 15 is divide it by 100
Examples :
1. What is 49% of 500?
Ans :
We know for 50% we need to divide by 2 so 50% is 250, and for 1% is the value divide by 100 so 1% is 5.
Then 49 = 50 - 1
= 250 - 5
= 245.
2. What is 32% of 200?
Ans :
We know for 10% we need to divide by 10 so 10% is 20, and for 1% is the value divide by 100 so 1% is 2.
Then 49 = 10 * 3 - 1* 2
= 20 * 3 - 2 * 2
= 56.
3. What % is 25 from 200?
Ans :
Then what is 25 part out of 200 in terms of percentage.
25/200 * 100 = 12.5%
Another Method :
100% = 200
?% = 25
Then cross multiply = 100 * 25 / 200 = 2500 / 200 = 12.5%
4. What % is 50 from 200?
Ans :
Then what is 50 part out of 200 in terms of percentage.
50/200 * 100 = 25%
Another Method :
100% = 200
?% = 50
Then cross multiply = 100 * 50 / 200 = 2500 / 200 = 25%
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