Add 6/7 and 81/20
1st number: 6/7, 2nd number: 4 1/20
6/7 + 81/20 is 687/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
6/7 = 6 × 20/7 × 20 = 120/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
81/20 = 81 × 7/20 × 7 = 567/140 - Add the two like fractions:
120/140 + 567/140 = 120 + 567/140 = 687/140 - So, 6/7 + 81/20 = 687/140
In mixed form: 4127/140
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