Add 8/81 and 21/56
8/81 + 21/56 is 307/648.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 56 is 4536
Next, find the equivalent fraction of both fractional numbers with denominator 4536 - For the 1st fraction, since 81 × 56 = 4536,
8/81 = 8 × 56/81 × 56 = 448/4536 - Likewise, for the 2nd fraction, since 56 × 81 = 4536,
21/56 = 21 × 81/56 × 81 = 1701/4536 - Add the two like fractions:
448/4536 + 1701/4536 = 448 + 1701/4536 = 2149/4536 - 2149/4536 simplified gives 307/648
- So, 8/81 + 21/56 = 307/648
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/81+21/56 8/81+42/56 24/81+21/56 8/81+63/56 40/81+21/56 56/81+21/56