Question

A discount voucher offering 15% off is used to pay a bill. After using the voucher, the bill is reduced to £36.72.

Answer 1

Answer:£43.2

Step-by-step explanation:

We minus 15 from 100 to get the percentage represented by 36.72

We are using 100 because it represents the total which is unknown

We cross multiple and get our answer

36.72=85%

X =100%

100×36.72÷85=43.2

Answer 2

We can use the is/of=p/100 method for this problem. Since it's 15% off, this would mean that the bill is 85% of what it was initially. Plug the values into the is/of=p/100 formula.

36.72/x = 85/100

Solve  for x.

x=36.72/0.85

x=43.2

So, the bill was $43.20 before applying the voucher discount of 15% off.