A supermarket advertises detergent using a promotion of "buy one get two free." What percentage of the original price will the customer pay for each bottle of detergent?

Answer 1

May be easier if pick a number for the price of one bottle, say $10.

So under the sale, the customer gets 3 bottles for $10, that's $3.33/bottle.

What pct of original price is $3.33? 3.33/10 = 33.3% (rnd'd to tenths)

Answer 2

suppose the original price per bottle is x

current price per bottle is x/(1+2)=x/3

(x/3)/x=1/3=33.33%