Add 21/12 and 63/35
1st number: 1 9/12, 2nd number: 1 28/35
21/12 + 63/35 is 71/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 35 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 12 × 35 = 420,
21/12 = 21 × 35/12 × 35 = 735/420 - Likewise, for the 2nd fraction, since 35 × 12 = 420,
63/35 = 63 × 12/35 × 12 = 756/420 - Add the two like fractions:
735/420 + 756/420 = 735 + 756/420 = 1491/420 - 1491/420 simplified gives 71/20
- So, 21/12 + 63/35 = 71/20
In mixed form: 311/20
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