Question 238733
Ok do you understand what 20% off something means?

It means that 20% of that price is taken away from its original price.

So we are saying that the original price minus 20% of its original price equals its new price.

A good rule to remember is to find a percentage of something: find 1% first and then multiply by the percentage you want to find.

For example if you want to find 20% of the original price you would divide the original price by 100 to get 1% and then multliply by 20 to get 20%

Mathematically:

x = original price
y = new price

x-(20/100)*x = y

So in the question we know y but do not know x. So we need to rearrange to find x.

Take the common factor out of x

x(1-(20/100)) = y

x(4/5) = y

x = y/(4/5)

x = 12590/(4/5)

x = 15737.5

Another way to think about is is that the original price multiplied by 80% (100%-20%) equals the reduced price?

Does that help? Or is it more confusing? Please get back to me.