School enrollments have fluctuated quite a bit in Oregon this year. The state department of education predicted there would be 300,000 students enrolled state-wide. The enrollment ended up being 375,000. How much of a percentage increase over the projected amount is this?
A 25% increase in the projected amount.
A 15% increase in the projected amount.
A 10% increase in the projected amount.
A 20% increase in the projected amount.
Detailed Explanation
To compute for percentage increase (or decrease), use the formula:
Percentage increase:


TIP: If you don't like memorizing formulas, just remember to get the increase, then divide by the original number:

When you need your answer to be expressed as percentage, simply multiply it by 100:
0.25 x 100 = 25\%
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