Add 36/21 and 18/81, Solve 1 15/21 + 18/81 as a fraction

Add 36/21 and 18/81

1^st number: 1 15/21, 2^nd number: 18/81

36/21 + 18/81 is 122/63.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 81 is 567

Next, find the equivalent fraction of both fractional numbers with denominator 567
For the 1st fraction, since 21 × 27 = 567,
36/21 = 36 × 27/21 × 27 = 972/567
Likewise, for the 2nd fraction, since 81 × 7 = 567,
18/81 = 18 × 7/81 × 7 = 126/567
Add the two like fractions:
972/567 + 126/567 = 972 + 126/567 = 1098/567
1098/567 simplified gives 122/63
So, 36/21 + 18/81 = 122/63
In mixed form: 159/63

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