Question

The price of a toy usually costing £50 is increased to £65
Work out the percentage increase.

Answer 1

`(50)/(50\\)`
`= (65)/(50)`

Now cross-multiply

Let p represent the percentage

50(50) = 50(65) ; 2500p = 3250

now divide 2500 on both sides to find p

2500p/2500 and 3250/2500

p = 1.3 ; percentage change is equal to %1.3 increase