Add 21/28 and 3/10
21/28 + 3/10 is 21/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 10 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
21/28 = 21 × 5/28 × 5 = 105/140 - Likewise, for the 2nd fraction, since 10 × 14 = 140,
3/10 = 3 × 14/10 × 14 = 42/140 - Add the two like fractions:
105/140 + 42/140 = 105 + 42/140 = 147/140 - 147/140 simplified gives 21/20
- So, 21/28 + 3/10 = 21/20
In mixed form: 11/20
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