Question

The price of coal rises by 25%. If a family wants to keep its expense for coal same,by what percent should it's decrease it coal consumption? ​

Answer 1

Let the initial expenses on Sugar was Rs. 100.
Now, Price of Sugar rises 25%. So, to buy same amount of Sugar, they need to expense,
= (100 + 25% of 100) = Rs. 125.
But, They want to keep expenses on Sugar, so they have to cut Rs. 25 in the expenses to keep it to Rs. 100.
Now, % decrease in Consumption,
25125×100=20%


Mind Calculation Method;
100 === 25%↑ ===> → 125 === X%↓ ===> 100
Here, X = 25125×100=20%

Answer 2

Step-by-step explanation:

The price of coal rises by 25%. If a family wants to keep its expense for coal same,by what percent should it's decrease it coal consumption?