Add 63/18 and 18/72, Solve 3 9/18 + 18/72 as a fraction

Add 63/18 and 18/72

1^st number: 3 9/18, 2^nd number: 18/72

63/18 + 18/72 is 15/4.

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,
63/18 = 63 × 4/18 × 4 = 252/72
Likewise, for the 2nd fraction, since 72 × 1 = 72,
18/72 = 18 × 1/72 × 1 = 18/72
Add the two like fractions:
252/72 + 18/72 = 252 + 18/72 = 270/72
270/72 simplified gives 15/4
So, 63/18 + 18/72 = 15/4
In mixed form: 33/4

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