Add 72/4 and 21/18, Solve 18 0/4 + 1 3/18 as a fraction

Add 72/4 and 21/18

1^st number: 18 0/4, 2^nd number: 1 3/18

72/4 + 21/18 is 115/6.

Find the least common denominator or LCM of the two denominators:
LCM of 4 and 18 is 36

Next, find the equivalent fraction of both fractional numbers with denominator 36
For the 1st fraction, since 4 × 9 = 36,
72/4 = 72 × 9/4 × 9 = 648/36
Likewise, for the 2nd fraction, since 18 × 2 = 36,
21/18 = 21 × 2/18 × 2 = 42/36
Add the two like fractions:
648/36 + 42/36 = 648 + 42/36 = 690/36
690/36 simplified gives 115/6
So, 72/4 + 21/18 = 115/6
In mixed form: 191/6

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