Final answer:
To find the difference between the cost of the perfume in Italy and the cost of the perfume in London, convert the cost in Italy to pounds and subtract the cost in London.
Step-by-step explanation:
To find the difference between the cost of the perfume in Italy and the cost of the perfume in London, we need to convert the cost in Italy to pounds and then subtract the cost in London.
First, we convert the cost of the perfume in Italy from euros to pounds. We know that £1 = 1.25 euros, so to find the cost in pounds, we divide 50 euros by the exchange rate: 50 euros ÷ 1.25 = £40.
Next, we subtract the cost of the perfume in London (£42) from the cost in Italy (£40): £40 - £42 = -£2.
The negative sign indicates that the cost in London is greater than the cost in Italy, so the difference between the two costs is £2.