Add 81/12 and 21/35
1st number: 6 9/12, 2nd number: 21/35
81/12 + 21/35 is 147/20.
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,
81/12 = 81 × 35/12 × 35 = 2835/420 - Likewise, for the 2nd fraction, since 35 × 12 = 420,
21/35 = 21 × 12/35 × 12 = 252/420 - Add the two like fractions:
2835/420 + 252/420 = 2835 + 252/420 = 3087/420 - 3087/420 simplified gives 147/20
- So, 81/12 + 21/35 = 147/20
In mixed form: 77/20
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