Question

4 years ago a pint of milk

cost £1.05 it now costs £1.26.
What is the percentage
increase of the cost of milk
over 4 years?

Answer 1

• Initial cost =£1.05
• Final cost=£1.26

Rate of change=1.26-1.05=£0.31

Now percentage of change

`\\ \sf\longmapsto (0.21)/(1.05)* 100`

`\\ \sf\longmapsto (100)/(5)`

`\\ \sf\longmapsto 20\%`

Answer 2

Given-

Cost of milk 4 years ago = £1.05

To find-

Percentage increase in cost

Solution-

Increase in cost = £ ( 1.26 - 1.05 )

→ £ 0.21

Percentage increase :-

`(0.21)/(1.05) * 100`

`→ 20`

Therefore, Percentage increase of the cost of milk over 4 years is 20% .

✍️ By Benjemin ☺️