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OpenStudy (anonymous):
163.35 is 45% of what number> How do I solve w/o a calculator?
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OpenStudy (anonymous):
363
OpenStudy (anonymous):
163.45 = 0.45 x number Required Number = 163.45/0.45
OpenStudy (anonymous):
cross muliply= 163.35/x=45/100
OpenStudy (anonymous):
both mean the same wilverine
OpenStudy (anonymous):
Know a method of solving w/o a calc? I could just multiply, but another method would help
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OpenStudy (anonymous):
Wait I can cross multiply this?
OpenStudy (anonymous):
that is without using calculator.. simple long division and multiplcation
OpenStudy (anonymous):
yeah the fractions is equal to each other because 163.35/x where x is 100% and 163.35 is 45% of x
OpenStudy (anonymous):
Can I cross multiply this also? 105=y*24%?
OpenStudy (anonymous):
yeah. 105/y=24/100.. but it can also solve for y, because to change a percent to a number just move decimal over 2 places to the left, 105=y*.24
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