Add 8/63 and 21/81
8/63 + 21/81 is 73/189.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 63 × 9 = 567,
8/63 = 8 × 9/63 × 9 = 72/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
21/81 = 21 × 7/81 × 7 = 147/567 - Add the two like fractions:
72/567 + 147/567 = 72 + 147/567 = 219/567 - 219/567 simplified gives 73/189
- So, 8/63 + 21/81 = 73/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/63+21/81 8/63+42/81 24/63+21/81 8/63+63/81 40/63+21/81 56/63+21/81