Average attendance at a school's basketball games increased from 1000 to 1500 last year. One student said that represented a 150% increase. Explain the student's error.

Question

Please help!

Answer 1

(1500 - 1000) / 1000 = ?

Multiply the decimal answer by 100 to find the percentage.

Answer 2

OK, not enough caffeine.

kidding . . .

probably divided the new total by the old total - which is incorrect.

should be difference divided by old total