Add 48/4 and 9/21, Solve 12 0/4 + 9/21 as a fraction

Add 48/4 and 9/21

1^st number: 12 0/4, 2^nd number: 9/21

48/4 + 9/21 is 87/7.

Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 4 × 21 = 84,
48/4 = 48 × 21/4 × 21 = 1008/84
Likewise, for the 2nd fraction, since 21 × 4 = 84,
9/21 = 9 × 4/21 × 4 = 36/84
Add the two like fractions:
1008/84 + 36/84 = 1008 + 36/84 = 1044/84
1044/84 simplified gives 87/7
So, 48/4 + 9/21 = 87/7
In mixed form: 123/7

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