85
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17x1=17 17x2=34 17x3=51 17x4=68 17x5=85 17x6=102 17x7=119 17x8=136 17x9=153 17x10=170
17 goes into itself once and it goes into 85 5 times. So write 17/85 as (17x1)/(17x5) and cancel the 17s. What is left is 1/5/
Original Price x .85 = 136 Original price = 136/.85 (If you are allowed to use a calculator, you are done here.) IF not, factor and cancel... 136X100/85 = 2x2x2x17x2x2x5x5/17x5 = 2x2x2x2x2x5 = 32 x 5 = 160 160