Add 21/28 and 20/9, Solve 21/28 + 2 2/9 as a fraction

Add 21/28 and 20/9

1^st number: 21/28, 2^nd number: 2 2/9

21/28 + 20/9 is 107/36.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 9 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 28 × 9 = 252,
21/28 = 21 × 9/28 × 9 = 189/252
Likewise, for the 2nd fraction, since 9 × 28 = 252,
20/9 = 20 × 28/9 × 28 = 560/252
Add the two like fractions:
189/252 + 560/252 = 189 + 560/252 = 749/252
749/252 simplified gives 107/36
So, 21/28 + 20/9 = 107/36
In mixed form: 235/36

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