You start with 100 units and end with 150 units, what is the percentage increase?

In order to find out the percentage of increase, first you need to find out the difference between initial units and the ending units, in this case:

150 - 100 = 50 units

After that, you need to do this calculation:

50 units / 100 units x 100%

= 0.5 x 100 %

= 50% increases