Add 20/81 and 15/8
1st number: 20/81, 2nd number: 1 7/8
20/81 + 15/8 is 1375/648.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 8 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 81 × 8 = 648,
20/81 = 20 × 8/81 × 8 = 160/648 - Likewise, for the 2nd fraction, since 8 × 81 = 648,
15/8 = 15 × 81/8 × 81 = 1215/648 - Add the two like fractions:
160/648 + 1215/648 = 160 + 1215/648 = 1375/648 - So, 20/81 + 15/8 = 1375/648
In mixed form: 279/648
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