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The number that multiplied by 32 would equal 81 is 2.53125.
If multiplied by a number, it would equal 81%. ie, 100*.81=81
18 multiplied by 81 is 1,458.
The answer is 81/32, which is 2.53125.
Use your calculator to calculate the square root of 81. Or use trial-and-error, to see which number, when multiplied by itself, gives you 81. (Hint: In this case, it is an integer.)