Add 15/42 and 81/5, Solve 15/42 + 16 1/5 as a fraction

Add 15/42 and 81/5

1^st number: 15/42, 2^nd number: 16 1/5

15/42 + 81/5 is 1159/70.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 5 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 42 × 5 = 210,
15/42 = 15 × 5/42 × 5 = 75/210
Likewise, for the 2nd fraction, since 5 × 42 = 210,
81/5 = 81 × 42/5 × 42 = 3402/210
Add the two like fractions:
75/210 + 3402/210 = 75 + 3402/210 = 3477/210
3477/210 simplified gives 1159/70
So, 15/42 + 81/5 = 1159/70
In mixed form: 1639/70

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