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OpenStudy (anonymous):
Four-sevenths of the children in a class earned A's on the last history test. 21 children did not earn an A. How many children earned A's? A) 49 B)77 C)3 D)28 PLEASE HELP!
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OpenStudy (jack1):
3/7 = 21 so 7/7 =...?
OpenStudy (jack1):
or 1/7 = then from that, find 4/7
OpenStudy (anonymous):
I dont know it did not give me enough info.
OpenStudy (jack1):
ok so 21 = 3/7 so 1/7 = 3/7 divided by 3 so 1/7 = 21/3 = 7 now 4 / 7 got a's so 1/7 = 7 students so how many students in 4/7?
OpenStudy (anonymous):
28?
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OpenStudy (jack1):
spot on champ
OpenStudy (anonymous):
WOOT ! Thank you so much :)
OpenStudy (jack1):
welcome
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