Add 21/36 and 35/21, Solve 21/36 + 1 14/21 as a fraction

Add 21/36 and 35/21

1^st number: 21/36, 2^nd number: 1 14/21

21/36 + 35/21 is 9/4.

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

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 36 × 7 = 252,
21/36 = 21 × 7/36 × 7 = 147/252
Likewise, for the 2nd fraction, since 21 × 12 = 252,
35/21 = 35 × 12/21 × 12 = 420/252
Add the two like fractions:
147/252 + 420/252 = 147 + 420/252 = 567/252
567/252 simplified gives 9/4
So, 21/36 + 35/21 = 9/4
In mixed form: 21/4

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