Add 48/12 and 28/21, Solve 4 0/12 + 1 7/21 as a fraction

Add 48/12 and 28/21

1^st number: 4 0/12, 2^nd number: 1 7/21

48/12 + 28/21 is 16/3.

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,
48/12 = 48 × 7/12 × 7 = 336/84
Likewise, for the 2nd fraction, since 21 × 4 = 84,
28/21 = 28 × 4/21 × 4 = 112/84
Add the two like fractions:
336/84 + 112/84 = 336 + 112/84 = 448/84
448/84 simplified gives 16/3
So, 48/12 + 28/21 = 16/3
In mixed form: 51/3

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