Add 81/20 and 84/7
1st number: 4 1/20, 2nd number: 12 0/7
81/20 + 84/7 is 321/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
81/20 = 81 × 7/20 × 7 = 567/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
84/7 = 84 × 20/7 × 20 = 1680/140 - Add the two like fractions:
567/140 + 1680/140 = 567 + 1680/140 = 2247/140 - 2247/140 simplified gives 321/20
- So, 81/20 + 84/7 = 321/20
In mixed form: 161/20
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