Question

Some money was invested at 12% interested for 2 years. If the interest was $21, how much was invested?

Answer 1

$87.5 was invested

Explanation:

10.5 is 12% of 87.5, so if the money was in the bank for 2 years, we would have to do 10.5*2 which is 21, and that's how much money was gained from the investment.