Add 18/15 and 25/42, Solve 1 3/15 + 25/42 as a fraction

Add 18/15 and 25/42

1^st number: 1 3/15, 2^nd number: 25/42

18/15 + 25/42 is 377/210.

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,
18/15 = 18 × 14/15 × 14 = 252/210
Likewise, for the 2nd fraction, since 42 × 5 = 210,
25/42 = 25 × 5/42 × 5 = 125/210
Add the two like fractions:
252/210 + 125/210 = 252 + 125/210 = 377/210
So, 18/15 + 25/42 = 377/210
In mixed form: 1167/210

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