The price of a TV is reduced in a sale by 30%. If the sale price is £280 what was the original price?

A question from 13 + specimen paper.

After the price of TV is reduced 30 % the price is £280. This means that £280 is 70% of the original price.

Therefore if you make an equation 280 x 100 / 70 you will get the original price of £400. :)