Add 21/18 and 10/72, Solve 1 3/18 + 10/72 as a fraction

Add 21/18 and 10/72

1^st number: 1 3/18, 2^nd number: 10/72

21/18 + 10/72 is 47/36.

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

Next, find the equivalent fraction of both fractional numbers with denominator 72
For the 1st fraction, since 18 × 4 = 72,
21/18 = 21 × 4/18 × 4 = 84/72
Likewise, for the 2nd fraction, since 72 × 1 = 72,
10/72 = 10 × 1/72 × 1 = 10/72
Add the two like fractions:
84/72 + 10/72 = 84 + 10/72 = 94/72
94/72 simplified gives 47/36
So, 21/18 + 10/72 = 47/36
In mixed form: 111/36

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