Add 1/21 and 30/27
1st number: 1/21, 2nd number: 1 3/27
1/21 + 30/27 is 73/63.
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,
1/21 = 1 × 9/21 × 9 = 9/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
30/27 = 30 × 7/27 × 7 = 210/189 - Add the two like fractions:
9/189 + 210/189 = 9 + 210/189 = 219/189 - 219/189 simplified gives 73/63
- So, 1/21 + 30/27 = 73/63
In mixed form: 110/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/21+30/27 1/21+60/27 1/42+30/27 1/21+30/54 3/21+30/27 1/21+90/27 1/63+30/27 1/21+30/81 5/21+30/27 7/21+30/27