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

1 Answer
MeneerNask
Jan 3, 2017

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#

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