The answer is B
! I agree with ggarr
I tried this using various numbers, $8 & $10, $9 and $11.25, etc.
Then I used a variety of different hours/week.
If you figure $8 before raise at 30 hrs/wk=$240/wk
Then take the weekly wage $240 and divide it by the new hourly wage ($8*1.25=$10) and you have
Then use the comparison
24/30=.8, then 1-.8=.2= 20%
reduce in workload.
I think it's B
Using briks123's example, you have to remember it's a decrease in workload
, not an increase, so you take 16/20=.8, and subtract that from 1 to give you .2 or 20%
20/16. (BTW 20/16 gives you how much she would have to increase
her workload to maintain the same income level after a cut
in pay), but you were on the right track!
However, if anyone knows a way to figure this out using a special rule, please let me know
! I need to work on speed and pacing, so I know I won't have time to plug in experimental numbers during the real GMAT!