If you have $90 and you spend 1/3 and 1/6th of it. How much do you have left?

Question

I’m doing math I need help with it.

Answer 1

If you spend 1/3 of it, you have spent 90(1/3) = $30.

That leave you with $60. 

Then, if you spend 1/6 of that, 60(1/6) = $10

You are now left with $50.