Question

Ed earned $112 for 8 hours o work. At this rate, how much will he earn for 40 hours of work?

Answer 1

This is a ratio problem.

Explanation:

`$112div8h=Xdiv40h` or `($112)/(8h)=X/(40h)`

Cross-multiply: `Xxx8h=$112xx40h`

Divide by `8h`: `X=($112xx(5xxcancel8)cancelh)/(cancel8cancelh)=$112xx5=$560`

Note :
Of course you could have seen that `40=5xx8` so the money would also be `5xx` as much.

Or you could have set up the ratio differently:

`(40h)/(8h)=X/($112)->5=X/($112)->X=5xx$112`