Question

20 is 50% of what ?

Answer 1

This is how u get there. 50% means half

Answer 2

So 100% is 2*20=40

Answer 3

50% = 1/2
so 20 divided by 1/2 (or multiplied by 2/1) is 40

Answer 4

What if the question was phrased this way: "If 20$ is half the money in my wallet - -how much money do I have?"

Answer 5

50% is another way of writing 50/100

Answer 6

40

Answer 7

or u could just write out the algebraic equation:
20 = .5x
x = 20/.5
x = 40

Answer 8

(20/50)*100
2*20
40