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2015-05-22T18:11:18+08:00

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45=B% x 120
Divide both sides by 120
0.375=B
Convert to percent:
B%=37.5%

Hope this helps =)


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2015-05-22T21:04:09+08:00

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This is in the percentage format where:
Percentage=Rate*Base \\ 45= \frac{B}{100} *120
We simplify this getting;
45= \frac{6B}{5}  \\ 45*5=6B \\ 225=6B \\ 37.5=B

Therefore B is 37.5
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