Question

You go shopping and you use two 20% off coupons. You think this might equal 40% off but it does not. Calculate what percent the actual discount is.

Answer 1

The actual discount will be 36% off

`36\text{\%}`

Step-by-step explanation:

Given that you use two 20% off coupon.

`\begin{gathered} 20\text{ \% off will be;} \\ 100-20\text{\%} \\ =80\text{\%} \\ =0.80 \end{gathered}`

double 20% off coupon will give;

`0.80*0.80=0.64`
`0.64=64\text{\%}`

Which means you will only pay 64%.

That is the amount off is;

`100\text{\% - 64\% = 36\%}`

Therefore, the actual discount will be 36% off

`36\text{\%}`