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%

30% increase

Step-by-step explanation:

(39-30)/30 × 100

9/30×100=(9×100)/30=900/30=30

step-by-step explanation:

how many centimeters did the level of the salsa go down by?

x = 12

y = 15

step-by-step explanation: