Add 8/21 and 3/27
8/21 + 3/27 is 31/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 27 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 21 × 9 = 189,
8/21 = 8 × 9/21 × 9 = 72/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
3/27 = 3 × 7/27 × 7 = 21/189 - Add the two like fractions:
72/189 + 21/189 = 72 + 21/189 = 93/189 - 93/189 simplified gives 31/63
- So, 8/21 + 3/27 = 31/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/21+3/27 8/21+6/27 8/42+3/27 8/21+3/54 24/21+3/27 8/21+9/27 8/63+3/27 8/21+3/81 40/21+3/27 8/21+15/27 56/21+3/27 8/21+21/27