In a 20% off sale a coat was £220 workout the original price

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