Question

ray is buying some ginger roots to brew some fresh ginger ale. the price of the ginger roots is g and ray has a coupon for 10% off

Answer 1

The price of ginger roots without discount= G

Ray has a coupon for 10% off

If Ray used this coupon then,  the price of Ginger roots shall be

10% off on G

i.e. 0.1 G off on the price G

the price of Ginger roots after discount= G-0.1G

i.e. G(1-0.1)=0.9 G

Money Ray saved using coupon= 0.1 G