Problema Solution
If the price of petrol increases by 25% and Rajesh intends to spend only 15% more on petrol.By how much percent should he reduce the quantity of petrol that he buys?
Answer provided by our tutors
Let the initial cost of 1 liter be A
Cost after increase = 1.25A (25% increase)
Let Rajesh’s initially buy be ‘B’ liters of petrol
Initial spent = AB
Increase in spent = 15%,
Current spent = 1.15 AB (15% increase)
Let the number of liters he is buying now is C. Therefore
1.25AC = 1.15 AB divide both sides by A
1.25 C = 1.15 B
C = 0.92B, which means that current consumption is 92% of earlier consumption,
therefore Rajesh has reduced his consumption by 8 %.