Add 10/28 and 20/21
10/28 + 20/21 is 55/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
10/28 = 10 × 3/28 × 3 = 30/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
20/21 = 20 × 4/21 × 4 = 80/84 - Add the two like fractions:
30/84 + 80/84 = 30 + 80/84 = 110/84 - 110/84 simplified gives 55/42
- So, 10/28 + 20/21 = 55/42
In mixed form: 113/42
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