lets do it with an example
Sale price is $75
this is after a 15% discount has been applied.
the original price was 100% but now that 15% has been discounted only 100-15=85% is left.
So
85% of the original price is $75
let the original price be P
85% of P = 75
0.85P=75
divide both sides by 0.85
P=75/0.85
The answer is not an exact number of dollars and - you'd just round it off to the nearest cent
P=$88.24
Most times when they give you these at school the answer would be exact and you wouldn't need to round off. :)
check 85% of 88.24 = 0.85*88.24=$75 GREAT :))
