SOLUTION: I'm having a small problem with adding,multiplying,subtracting,and dividing fractions and i really want a good grade in algebra..help?

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Question 356902: I'm having a small problem with adding,multiplying,subtracting,and dividing fractions and i really want a good grade in algebra..help?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Adding and subtracting fractions-you need a common denominator.
1%2F2%2B1%2F5=%281%2F2%29%285%2F5%29%2B%281%2F5%29%282%2F2%29=5%2F10%2B2%2F10=7%2F10
6%2F7-3%2F2=%286%2F7%29%282%2F2%29-%283%2F2%29%287%2F7%29=12%2F14-21%2F14=-9%2F14
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Mutliplying fractions is easiest.
Multiply numerators together.
Multiply denominators together.
Look for common factors in numerator and denominator and cancel them out to simplify.
%285%2F6%29%289%2F11%29=45%2F66=%2815%2A3%29%2F%2822%2A3%29=15%2F22
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%281%2F9%29%284%2F7%29=4%2F63
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Dividing by a fraction is the same as multiplying by its reciprocal.
%282%2F3%29%2F%284%2F7%29=%282%2F3%29%287%2F4%29=14%2F12=%287%2A2%29%2F%286%2A2%29=7%2F6
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%2819%2F12%29%2F%281%2F5%29=%2819%2F12%29%285%2F1%29=95%2F12