a. original price= $86 sale 5%
ii. the number we can multiply the original price is:
1-(5/100)=0.95
iii. the new price is the original price*number on ii
86*0.95=81.7
b. original price= $9 sale 15%
ii. 1-(15/100)=0.85
iii. 9* 0.85= 7.65
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