After a 80% reduction, you purchase a new washing on sale for $100. What was the original price of the washing machine?

Answer: the original price of the washing machine is $500

Method 1: ___ *.2 = $100

so 100/.2 = 500

Checking our work:

500*.2 = 100

500*.8 = 400 500-400 = 100

So the original price was $500, but after the 80% reduction, you would purchase for $100.