Add 36/21 and 8/18, Solve 1 15/21 + 8/18 as a fraction

Add 36/21 and 8/18

1^st number: 1 15/21, 2^nd number: 8/18

36/21 + 8/18 is 136/63.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 18 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 21 × 6 = 126,
36/21 = 36 × 6/21 × 6 = 216/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
8/18 = 8 × 7/18 × 7 = 56/126
Add the two like fractions:
216/126 + 56/126 = 216 + 56/126 = 272/126
272/126 simplified gives 136/63
So, 36/21 + 8/18 = 136/63
In mixed form: 210/63

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