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OpenStudy (anonymous):
MENTAL MATH: what is 15% of 28
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OpenStudy (dmezzullo):
Like what percent?
OpenStudy (anonymous):
4.2%
OpenStudy (anonymous):
it says what is 15% OF 28
OpenStudy (anonymous):
do I just write it down like that?
OpenStudy (anonymous):
15% of 28 is 4.2
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OpenStudy (anonymous):
yep^
OpenStudy (anonymous):
Mentally? I'd take 1.5 times 28 to get 28+14=42 and then take 1/10 of that to get 4.2
OpenStudy (anonymous):
ohh ok
OpenStudy (anonymous):
I'd try 280/20 then multiply by 3 then divide by 10
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