Add 90/12 and 24/21, Solve 7 6/12 + 1 3/21 as a fraction

Add 90/12 and 24/21

1^st number: 7 6/12, 2^nd number: 1 3/21

90/12 + 24/21 is 121/14.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 12 × 7 = 84,
90/12 = 90 × 7/12 × 7 = 630/84
Likewise, for the 2nd fraction, since 21 × 4 = 84,
24/21 = 24 × 4/21 × 4 = 96/84
Add the two like fractions:
630/84 + 96/84 = 630 + 96/84 = 726/84
726/84 simplified gives 121/14
So, 90/12 + 24/21 = 121/14
In mixed form: 89/14

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