SOLUTION: PLEASE HELP...A FAMILY SPENT $408 ONE MONTH FOR FOOD. THIS WAS 20% OF THEIR INCOME. WHAT WAS THEIR MONTHLY INCOME?

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Question 501135: PLEASE HELP...A FAMILY SPENT $408 ONE MONTH FOR FOOD. THIS WAS 20% OF THEIR INCOME. WHAT WAS THEIR MONTHLY INCOME?
Found 2 solutions by josmiceli, guitarheroguy:
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +x+ = their monthly income
given:
+408+=+.2x+
Divide both sides by .2
+x+=+408%2F.2+
+x+=+2040+
Their monthly income was $2,040

Answer by guitarheroguy(26) About Me  (Show Source):
You can put this solution on YOUR website!
Well, 20%=.20
And .20*5=1.00, or 100%
So we multiply the $408 by 5.
408*5=$2,040
So....
Their monthly income is $2,040