Jim earn $15 babysitting for 3hours a day. Last month he worked 18 hours. He spent 1/3 of the money on new jeans. How much money does he have left?

Since Jim gets $15 for every 3 hours then in order to find the salary for 18 hours, you multiply 15 by 6.

$15 for 3 hours; 15:3

$? for 18 hours; ?:18

See it?

Well, you multiply 15 and 6 and you'd get 90.

$15 for 3 hours; 15:3

$90 for 18 hours; 90:18

Then, of course, Jim decides to spend his money on some pants for prom. (That prom isn't true, but let's pretend it is.)

So he spends 1/3 of his money for some pair of pants. = 3=

So you would do 1/3 multiplied with 90.

That would, of course, result with 30.

So Jim wasted $30 on jeans.

So ...

90-30=60

He got $60 left.