SOLUTION: what is the answer ti 7/15 + 5/12?

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Question 561275: what is the answer ti 7/15 + 5/12?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+7%2F15+%2B+5%2F12+
The only factor that is common to both +12+ and 15+
is +3+, since +3%2A4+=+12+ and +3%2A5+=+15+
I'll try +12%2A15+ for an LCD, but I'll divide it by the
common factor of +3+.
+%28+12%2A15+%29%2F3+=+4%2A15+
+4%2A15+=+60+
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Multiply the top and bottom of +7%2F15+ by +4+
+%284%2F4%29%2A%287%2F15%29+=+28%2F60+
Multiply the top and bottom of +5%2F12+ by +5+
+%285%2F5%29%2A%285%2F12%29+=+25%2F60+
+28%2F60+%2B+25%2F60+=+53%2F60+ answer
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An easy way to check this is to use decimals from calculator:
+7%2F15+=+.4666667+
+5%2F12+=+.4166667+
+7%2F15+%2B+5%2F12+=+.8833333+
and
+53%2F60+=+.8833333+
OK