Add 81/72 and 42/18, Solve 1 9/72 + 2 6/18 as a fraction

Add 81/72 and 42/18

1^st number: 1 9/72, 2^nd number: 2 6/18

81/72 + 42/18 is 83/24.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 18 is 72

Next, find the equivalent fraction of both fractional numbers with denominator 72
For the 1st fraction, since 72 × 1 = 72,
81/72 = 81 × 1/72 × 1 = 81/72
Likewise, for the 2nd fraction, since 18 × 4 = 72,
42/18 = 42 × 4/18 × 4 = 168/72
Add the two like fractions:
81/72 + 168/72 = 81 + 168/72 = 249/72
249/72 simplified gives 83/24
So, 81/72 + 42/18 = 83/24
In mixed form: 311/24

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