The table shows enrollment in a community college's online courses.
Year | Students enrolled 2020 | 1,200 2021 | 1,350 2022 | 1,500
By what percent did enrollment increase from 2020 to 2022?
Show answer & explanation
Answer: B
20 percent: This divides the increase of 300 by the 2022 value (1,500) instead of the starting value.
25 percent: Correct. The increase is 1,500 − 1,200 = 300, and 300 ÷ 1,200 = 0.25, or 25 percent.
30 percent: This treats the increase of 300 students as if it were 30 percent without dividing by the starting value.
300 percent: 300 is the number of additional students, not a percent change.
Percent change = (new − original) ÷ original × 100; always divide by the starting value.