Add 24/21 and 20/36, Solve 1 3/21 + 20/36 as a fraction

Add 24/21 and 20/36

1^st number: 1 3/21, 2^nd number: 20/36

24/21 + 20/36 is 107/63.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 36 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 21 × 12 = 252,
24/21 = 24 × 12/21 × 12 = 288/252
Likewise, for the 2nd fraction, since 36 × 7 = 252,
20/36 = 20 × 7/36 × 7 = 140/252
Add the two like fractions:
288/252 + 140/252 = 288 + 140/252 = 428/252
428/252 simplified gives 107/63
So, 24/21 + 20/36 = 107/63
In mixed form: 144/63

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