math
posted by anonymos .
Leroy ran a total of 15 miles last month. He ran 5/8 miles each day. How days did he run?

Here's the way I (not a math teacher) figure out this problem.
If Leroy ran a mile a day, he'd run for 15 days. But he ran less than a mile a day, so he must have run more than 15 days.
Your answer needs to be something between 15 and 31.
What can you do with those numbers to get an answer between 15 and 31?
I'll be glad to check your answer.