30 of 40

30 of 40 is 12

Best way to calculate:


Unknown value "Y"

100% / 40 = 30% / Y 100 / 40 = 30 / Y
Y ( 100 / 40 ) = 30
Y = 30 ( 40 / 100 )
Y = 12

The Answer: 12

Source: What is 30 of 40

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