15% of 42 = 42*15/100 = 6.3
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%*amount=answer .15(15%) * x = 42 thefore 42/.15= x x=280
First you calculate the 15% of 280: 15*280/100=42 Than, 280+42=322
15 [lots] of 2.80 are 42.0
15*42/100 = 630/100 which can be simplified to 63/10 or 63/10
To find the number that is 15% of 280, multiply 280 by 0.15 (the equalent of 15% in decimal form). The answer is 42.