Question

If there are 6 yellow gumballs in a machine, and that is 20% of the

total number of gumballs, how many are in the machine?

Answer 1

30

Explanation:

20% is 1/5 of 100.

This means working backwards we can multiply 6 and 5 because 1/5's reciprocal is 5.

This gets 30 gumballs.

Answer 2

30

Explanation:

20x/100=6

cross multiply

600=20x

Divide both sides by the coefficient of x

600/20=x

x=30