x - 30% of x = 91
→ 70% x = 91
→ x = 91÷ 70% = 130
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"30 percent off" means "70 percent on" .70% = 0.70.7 x $130 = $91
so in other word you need to put it into a number model, 91 is 65percent of ( times) blank....... 65percent * blank = 91 . So you have to divide 65 by 91 and u round that number . so the answer is 140
40% of 91= 40% * 91= 0.4 * 91= 36.4
91% of 100, which is 91, divided by 91 equals 1.
14 is 15.38% of 91.