Add 9/21 and 56/12, Solve 9/21 + 4 8/12 as a fraction

Add 9/21 and 56/12

1^st number: 9/21, 2^nd number: 4 8/12

9/21 + 56/12 is 107/21.

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

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 21 × 4 = 84,
9/21 = 9 × 4/21 × 4 = 36/84
Likewise, for the 2nd fraction, since 12 × 7 = 84,
56/12 = 56 × 7/12 × 7 = 392/84
Add the two like fractions:
36/84 + 392/84 = 36 + 392/84 = 428/84
428/84 simplified gives 107/21
So, 9/21 + 56/12 = 107/21
In mixed form: 52/21

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