When you divide a number by 1/2, the result is
a) half the original number.
b) twice the original number.
c) 50% of the original number.
d) 100% of the original number.

Let us analyze the following situation: The number we want to divide by 1/2 is X. We can write:
X/(1/2)=(X/1)/(1/2)=(X*2)/(1*1)= X*2,
which means that the number that is divided with 1/2 is multiplied by 2 (twice the original number).
When you divide a number by 1/2, the result is twice the original number . B

I'm gonna have to say about 13 percent