Add 8/81 and 63/42
1st number: 8/81, 2nd number: 1 21/42
8/81 + 63/42 is 259/162.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 42 is 1134
Next, find the equivalent fraction of both fractional numbers with denominator 1134 - For the 1st fraction, since 81 × 14 = 1134,
8/81 = 8 × 14/81 × 14 = 112/1134 - Likewise, for the 2nd fraction, since 42 × 27 = 1134,
63/42 = 63 × 27/42 × 27 = 1701/1134 - Add the two like fractions:
112/1134 + 1701/1134 = 112 + 1701/1134 = 1813/1134 - 1813/1134 simplified gives 259/162
- So, 8/81 + 63/42 = 259/162
In mixed form: 197/162
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/81+63/42 8/81+63/84 24/81+63/42 40/81+63/42 56/81+63/42