How do you subtract #\frac { 13} { 14s } - \frac { 11} { 49s }#?

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Answer 1 · 2018-03-17T18:30:43

#69/(98s)#

First we find common denominators. I did by multiplying each denominator to the other fraction. Should look like this

#((49)13)/((49)14s)-((14)11)/((14)49s)#

Then we get
#637/(686s)-154/(686s)#

#(637-154)/(686s)#

#483/(686s)#

There is a common multiple of #7# between the numerator and denominator. So we then divide the numerator and denominator by #7#, giving us

#69/(98s)#