Add 15/7 and 20/81
1st number: 2 1/7, 2nd number: 20/81
15/7 + 20/81 is 1355/567.
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,
15/7 = 15 × 81/7 × 81 = 1215/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
20/81 = 20 × 7/81 × 7 = 140/567 - Add the two like fractions:
1215/567 + 140/567 = 1215 + 140/567 = 1355/567 - So, 15/7 + 20/81 = 1355/567
In mixed form: 2221/567
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