Add 72/36 and 63/42, Solve 2 0/36 + 1 21/42 as a fraction

Add 72/36 and 63/42

1^st number: 2 0/36, 2^nd number: 1 21/42

72/36 + 63/42 is 7/2.

Find the least common denominator or LCM of the two denominators:
LCM of 36 and 42 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 36 × 7 = 252,
72/36 = 72 × 7/36 × 7 = 504/252
Likewise, for the 2nd fraction, since 42 × 6 = 252,
63/42 = 63 × 6/42 × 6 = 378/252
Add the two like fractions:
504/252 + 378/252 = 504 + 378/252 = 882/252
882/252 simplified gives 7/2
So, 72/36 + 63/42 = 7/2
In mixed form: 31/2

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