Hi GloryBoy92,
Yes - you can TEST VALUES here; since the variables in this question are related to one another though, you have to pay careful attention to what the prompt tells us (and make sure that the values you test match what we are told). We actually have to start off with the information in the 2nd sentence:
"The TOTAL amount of money that she had saved at the end of the YEAR was 3 times the amount of that portion of her monthly take-home pay that she did NOT save." Let's start with a nice, round number for the money that she did NOT save....
Money NOT saved each MONTH: $100
We're told that the total money saved for the YEAR was 3 times that amount....
TOTAL money saved for the YEAR: (3)($100) = $300
Since that total was for 12 months, we divide $300 by 12 to find the amount of money that she SAVED each MONTH...
$300/12 = $25
At this point, we know everything we need to now about her monthly pay:
-She saved $25 a month
-She did NOT save $100 a month (meaning she spent this money each month)
Total for the month = $25 + $100 = $125
Fraction of pay each month that is SAVED = $25/$125 = 1/5
GMAT assassins aren't born, they're made,
Rich
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