Add 72/16 and 21/12, Solve 4 8/16 + 1 9/12 as a fraction

Add 72/16 and 21/12

1^st number: 4 8/16, 2^nd number: 1 9/12

72/16 + 21/12 is 25/4.

Find the least common denominator or LCM of the two denominators:
LCM of 16 and 12 is 48

Next, find the equivalent fraction of both fractional numbers with denominator 48
For the 1st fraction, since 16 × 3 = 48,
72/16 = 72 × 3/16 × 3 = 216/48
Likewise, for the 2nd fraction, since 12 × 4 = 48,
21/12 = 21 × 4/12 × 4 = 84/48
Add the two like fractions:
216/48 + 84/48 = 216 + 84/48 = 300/48
300/48 simplified gives 25/4
So, 72/16 + 21/12 = 25/4
In mixed form: 61/4

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