Question

40% of what number is 5

Answer 1

It would be 12 and 1/2 because 40% is 2 and 1/2 of 100 and then you do 5 times 2 and 1/2 and you get 12 and 1/2.

Answer 2

40% can be expressed as 40/100 or 0.4


`(40)/(100) * x = 5\\\\0.4 * x = 5`

Divide both sides by 0.4 to isolate 'x'


`0.4x = 5\\\\(0.4x)/(0.4) = (5)/(0.4)\\\\x = (5)/(0.4) \\\\\boxed{\bf{x = 12.5}}`

40% of 12.5 is 5.