Add 72/10 and 12/21, Solve 7 2/10 + 12/21 as a fraction

Add 72/10 and 12/21

1^st number: 7 2/10, 2^nd number: 12/21

72/10 + 12/21 is 272/35.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 10 × 21 = 210,
72/10 = 72 × 21/10 × 21 = 1512/210
Likewise, for the 2nd fraction, since 21 × 10 = 210,
12/21 = 12 × 10/21 × 10 = 120/210
Add the two like fractions:
1512/210 + 120/210 = 1512 + 120/210 = 1632/210
1632/210 simplified gives 272/35
So, 72/10 + 12/21 = 272/35
In mixed form: 727/35

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