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2015-09-29T20:47:01+08:00

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9/10 + 4/5 + 8/12 = 2 11/30

First get their LCM.
LCM = 60

Rewrite the fractions with their LCD as denominators.
54/60 + 48/60 + 40/60

Add them all.
54/60 + 48/60 + 40/60 = 142/60

Get its lowest term.
142/60 = 71/30 or 2 11/30
                                                                                        -KookEin
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2015-09-29T21:15:17+08:00

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
9/10 + 4/5 + 8/12
FIND THE LCD
60 is the LCD.

60 / 10 x 9 = 54
60 / 5 x 4 = 48
60 / 12 x 8 = 40

54 + 48 + 40 = 142
142/60
Change to mixed number.
142/60 is 2. A remainder of 22. And still our denominator, 60.
Renaming, the answer is 
2 22/60
Rename more,
2 11/30
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