Question 207903
"Ace bought a tennis racket for $20 on sale. This was a reduction in price of 20%. What was the regular price?" 
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If it's reduced by 20%, then $20 is 80% of the original price.
Most percent problems can be done by first finding what 1% is.
In this case, $20 is 80%, so 1% is $20/80 = $0.25
100% is 100 times that.
$.025*100 = $25.