# 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 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. $9 \times 20 = 1.8$so take approximate$2.00 off

$19 - 2 = 17$ so about \$ 17.00