A package of strawberries costs 1.50 while they are in season and 2.25 when they aren't in season. What is the percent increse.

The answer is 50%.

Divide 2.25 by 1.50. That equals 1.5. That's the equivalent to 50% because if you subtract 1 from 1.5 and multiply by 100. You get the same answer. Only do that for numbers greater than one, otherwise it won't work