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sallyp
Average Member

USA
16 Posts

Posted - 05/12/2009 :  12:50:06  Show Profile  Reply with Quote
I am new to this sort of problem and need some help.

Mary got a 24/60 on his first test and 32/40 on the second. Billy 35/70 and 54/60, Joey 27/90 and 45/50. which kid improved the most and by what percentage?


Here is how I tried to answer:

Mary 24/60= 0.4 and 32/40=0.8

Bily 35/70= 0.5 and 54/60 =0.9

Joey 27/90= 0.3 and 45/50=0.9


It seems that Joey improved the most. Am I going about this the right way? How can I find out who improved most and by what percentage? Thanks.
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royhaas
Moderator

USA
3059 Posts

Posted - 05/12/2009 :  13:29:46  Show Profile  Reply with Quote
I would agree that Joey improved the most, both on an absolute and relative scale. He went from 0.3 to 0.9, which is an absolute increase of .6, but as a percentage increase it is 100*(.9-.3)/.3, or 200 percent.
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