Secondary I • 3yr.
Hello, how do I calculate a 20% discount on a sweater that costs $ 10? thank you
Hello, how do I calculate a 20% discount on a sweater that costs $ 10? thank you
Explanation from Alloprof
This Explanation was submitted by a member of the Alloprof team.
Hi
First of all, a discount indicates a decrease in the price, so you will pay less than $ 10 for the sweater.
Here is a trick you can use:
You take the number 1 and you put a +/- after it, like this:
1 +/-
If you have a tax, we do 1+
If we have a discount we do 1-
In this case, we have a 20% discount (20% corresponds to 0.2, because we make 20/100). In consequence, we do 1-0.2 = 0.8.
After this step, we only need to multiply 10 by 0.8 and we get the answer!
Hope to have helped you!