Add 21/28 and 20/36
21/28 + 20/36 is 47/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 36 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 36 × 7 = 252,
20/36 = 20 × 7/36 × 7 = 140/252 - Add the two like fractions:
189/252 + 140/252 = 189 + 140/252 = 329/252 - 329/252 simplified gives 47/36
- So, 21/28 + 20/36 = 47/36
In mixed form: 111/36
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