Add 81/14 and 21/18, Solve 5 11/14 + 1 3/18 as a fraction

Add 81/14 and 21/18

1^st number: 5 11/14, 2^nd number: 1 3/18

81/14 + 21/18 is 146/21.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 18 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 14 × 9 = 126,
81/14 = 81 × 9/14 × 9 = 729/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
21/18 = 21 × 7/18 × 7 = 147/126
Add the two like fractions:
729/126 + 147/126 = 729 + 147/126 = 876/126
876/126 simplified gives 146/21
So, 81/14 + 21/18 = 146/21
In mixed form: 620/21

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