Add 18/15 and 9/7, Solve 1 3/15 + 1 2/7 as a fraction

Add 18/15 and 9/7

1^st number: 1 3/15, 2^nd number: 1 2/7

18/15 + 9/7 is 87/35.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 7 is 105

Next, find the equivalent fraction of both fractional numbers with denominator 105
For the 1st fraction, since 15 × 7 = 105,
18/15 = 18 × 7/15 × 7 = 126/105
Likewise, for the 2nd fraction, since 7 × 15 = 105,
9/7 = 9 × 15/7 × 15 = 135/105
Add the two like fractions:
126/105 + 135/105 = 126 + 135/105 = 261/105
261/105 simplified gives 87/35
So, 18/15 + 9/7 = 87/35
In mixed form: 217/35

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