SOLUTION: After a rise in the price of petrol, the driven mileage dropped down by 6.7%. However the fuel cost increased by 4.5%. By what percentage did the petrol price rise?

Question 398066: After a rise in the price of petrol, the driven mileage dropped down by 6.7%. However the fuel cost increased by 4.5%. By what percentage did the petrol price rise?
Answer by Tatiana_Stebko(1539) (Show Source): You can put this solution on YOUR website!
if the driven mileage before rise is D, then after rise it will be 0.933*D
If the fuel cost before rice is C, then after rise it will be 1.045*C
So the petrol price before rise is
the petrol price after rise is
so percentage the petrol price rise is
%
RELATED QUESTIONS
After a rise in the price of petrol, the driven mileage dropped down by 6.7%. However... (answered by Theo)

Any knows about this ? After a rise in price of petrol, the driven mileage dropped by... (answered by josmiceli)

please help me with the equation: The price of petrol is continuing to rise and fall... (answered by jorel1380)

A motorist reduces his annual distance travel by x% when the price of petrol is increased (answered by greenestamps)

A reduction in the price of petrol by 10% enables a motorist to buy 5 gallons more... (answered by MathLover1,josgarithmetic,greenestamps)

The cost of petrol increased by 15% one week but fell back to the original price the next (answered by Fombitz)

A shop increased the price of carpets by 25%. Sales of carpets dropped by 25%. Did the... (answered by QueenVoda)

The current petrol price per litre is R12.20.If the price increase by 7.5% how much will... (answered by macston)

the current petrol price ii R13.20 per litre. if the price increase by 7.5% how much will (answered by LinnW)