Add 72/15 and 15/42, Solve 4 12/15 + 15/42 as a fraction

Add 72/15 and 15/42

1^st number: 4 12/15, 2^nd number: 15/42

72/15 + 15/42 is 361/70.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 42 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 15 × 14 = 210,
72/15 = 72 × 14/15 × 14 = 1008/210
Likewise, for the 2nd fraction, since 42 × 5 = 210,
15/42 = 15 × 5/42 × 5 = 75/210
Add the two like fractions:
1008/210 + 75/210 = 1008 + 75/210 = 1083/210
1083/210 simplified gives 361/70
So, 72/15 + 15/42 = 361/70
In mixed form: 511/70

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