Add 20/7 and 21/81
1st number: 2 6/7, 2nd number: 21/81
20/7 + 21/81 is 589/189.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 7 × 81 = 567,
20/7 = 20 × 81/7 × 81 = 1620/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
21/81 = 21 × 7/81 × 7 = 147/567 - Add the two like fractions:
1620/567 + 147/567 = 1620 + 147/567 = 1767/567 - 1767/567 simplified gives 589/189
- So, 20/7 + 21/81 = 589/189
In mixed form: 322/189
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