What is the orginal price of an apple if you got it for 20% discount and paid 50 for it?

Question

0.80 divided by 50

Answer 1

If a is the original price of the apple, then a-0.2a=50, that is 0.8a=50 because 20%=0.20=0.2.

20% discount means that 50c is 80% of the original price a of the apple so 0.8a=50, a=50/0.8=62.5c.

Let's see if this is right by working out 20% of 62.5=12.5c. 62.5-12.5=50c which matches the price paid.

Realistically, the price of the apple before discount was probably 63c because there are no half cents in the currency. 1c is the minimum currency.

20% of 63=12.6, so 63-12.6=50.4c, which rounds to 50c.

Answer 2

original price of the apple =  50 + 20%original price

so let x be the original price of the apple

x=50+(20/100)x

x-(1/5)x=50

5x-x=50x5=250

4x=250

x=250/4=62.50

Original price = 62.50