Question

18 is 30% of what number?



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Answer 1

Call the number : x

18 is 30% of x => x : 0.3 = 18

x : 3/10 = 18 => (10/3)x = 18
x = 18 : 10/3 = 54/10 = 27/5

Recheck : 27/5 :3/10 = 270/15 = 18