A baseball hat with an original price of $19 is on sale for 10% off the original price. How do you estimate the sale price?

1 Answer
David Drayer · Astralboy
Jun 10, 2017

multiply the original price by .9.

Explanation:

10% off is 100% - 10%

# 100% - 10% = 90%#

# 90 % = .9#

Since they only ask for an estimate of the sales price, we round up #19# to #20# and then treat it as though the hat was #20# dollars.

# 9 xx 20 = 1.8 # so take approximate $2.00 off

# 19 -2 = 17# so about $ 17.00

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