Question

mittens are marked down 25% the sale price is 3.15 a pair what was the original price of a pair of mittens

Answer 1

4.20   
when I do percentages at the store with sales, I always take whatever the percent off is, off the dollar amount.. so 25% would be to take 25 cents off every dollar. 

Answer 2

$12.6 -- 25% of 12.6 is exactly $3.15

I did this by taking 3.15 / 0.25