The price of a litre of petrol is increased from C30.00 to C 39.00.

What is the percentage increase in the cost of a litre of petrol?

30% increase.

Step-by-step explanation:

Increased cost = final cost - initial cost

Increased cost = 39 - 30

Increased cost = 9

Percent increase from initial cost is given by,

Percent increase = (Increased cost / initial cost) * 100%

Percent increase = (9 / 30) * 100%

Percent increase = 30%

Answer:30% increase

Step-by-step explanation:

(39-30) / 30 * 100

9/30*100 = (9*100) / 30=900/30=30