Add 20/21 and 7/27
20/21 + 7/27 is 229/189.
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,
20/21 = 20 × 9/21 × 9 = 180/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
7/27 = 7 × 7/27 × 7 = 49/189 - Add the two like fractions:
180/189 + 49/189 = 180 + 49/189 = 229/189 - So, 20/21 + 7/27 = 229/189
In mixed form: 140/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21+7/27 20/21+14/27 20/42+7/27 20/21+7/54 60/21+7/27 20/21+21/27 20/63+7/27 20/21+7/81 20/21+35/27 20/21+49/27