Question

a stereo costs £320. In a sale it is reduced by 25%. What is the sale price?

Answer 1

$320\times \frac{75}{100} =320 \times \frac{25\times 3}{25\times 4} =320\times \frac{3}{4} = 80\times 4 \times \frac{3}{4} =80\times 3 = \boxed {240}$