Add 21/56 and 7/81
21/56 + 7/81 is 299/648.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 81 is 4536
Next, find the equivalent fraction of both fractional numbers with denominator 4536 - For the 1st fraction, since 56 × 81 = 4536,
21/56 = 21 × 81/56 × 81 = 1701/4536 - Likewise, for the 2nd fraction, since 81 × 56 = 4536,
7/81 = 7 × 56/81 × 56 = 392/4536 - Add the two like fractions:
1701/4536 + 392/4536 = 1701 + 392/4536 = 2093/4536 - 2093/4536 simplified gives 299/648
- So, 21/56 + 7/81 = 299/648
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