Add 4/21 and 25/27
4/21 + 25/27 is 211/189.
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,
4/21 = 4 × 9/21 × 9 = 36/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
25/27 = 25 × 7/27 × 7 = 175/189 - Add the two like fractions:
36/189 + 175/189 = 36 + 175/189 = 211/189 - So, 4/21 + 25/27 = 211/189
In mixed form: 122/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21+25/27 4/21+50/27 4/42+25/27 4/21+25/54 12/21+25/27 4/21+75/27 4/63+25/27 4/21+25/81 20/21+25/27 28/21+25/27