Add 9/21 and 40/27
1st number: 9/21, 2nd number: 1 13/27
9/21 + 40/27 is 361/189.
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,
9/21 = 9 × 9/21 × 9 = 81/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
40/27 = 40 × 7/27 × 7 = 280/189 - Add the two like fractions:
81/189 + 280/189 = 81 + 280/189 = 361/189 - So, 9/21 + 40/27 = 361/189
In mixed form: 1172/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/21+40/27 9/21+80/27 9/42+40/27 9/21+40/54 27/21+40/27 9/63+40/27 9/21+40/81 45/21+40/27 63/21+40/27