The office manager ordered boxes of pens. She distributed 60% of the boxes and still has 30 boxes left. Originally, she had:

Question

The office manager ordered boxes of pens. She distributed 60% of the boxes and still has 30 boxes left. Originally, she had:

Answer 1

If the manager distributed 60% of the pen boxes, that means there are still 40% remaining (the 30 pen boxes left).

40% = 30

From there, if we figure out how much it takes to go from 40% to 100%, we can use the same reasoning to find out how many pen boxes there were total.

40% doubled makes 80%, and half of 40% is 20%. This means that 40% * 2.5 = 100%

If we take 30 * 2.5, we will find the total number of pen boxes to equal 75.