Doughnuts at one shop cost £1.40 each. Doughnuts at a second shop cost 15% more.
What is the difference in the cost of doughnuts at the two shops?

The difference in the cost of doughnuts at the two shops is £0.21

Step-by-step explanation:

In the first shop, the doughnuts cost £1.40.

In the second shop:

15% more, that is, 1 + (15/100) = 1 + 0.15 = 1.15 of the first shop.

So

1.15*1.40 = £1.61

What is the difference in the cost of doughnuts at the two shops?

£1.61 - £1.40 = £0.21

The difference in the cost of doughnuts at the two shops is £0.21