Add 7/21 and 28/36
7/21 + 28/36 is 10/9.
Steps for adding fractions
- 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,
7/21 = 7 × 12/21 × 12 = 84/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
28/36 = 28 × 7/36 × 7 = 196/252 - Add the two like fractions:
84/252 + 196/252 = 84 + 196/252 = 280/252 - 280/252 simplified gives 10/9
- So, 7/21 + 28/36 = 10/9
In mixed form: 11/9
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