When we have a coat with a 20% discount we only pay the remaining 80%.
This 80% equals £220
The original price was 100%
First we find out the value of 1%:
220 / 80 = £2.75
Finally we want to know the total 100% so find multiply our 1% by 100
£2.75 * 100 = £275
So the original price was £275
