Add 25/21 and 20/27
1st number: 1 4/21, 2nd number: 20/27
25/21 + 20/27 is 365/189.
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,
25/21 = 25 × 9/21 × 9 = 225/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
20/27 = 20 × 7/27 × 7 = 140/189 - Add the two like fractions:
225/189 + 140/189 = 225 + 140/189 = 365/189 - So, 25/21 + 20/27 = 365/189
In mixed form: 1176/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/21+20/27 25/21+40/27 25/42+20/27 25/21+20/54 75/21+20/27 25/21+60/27 25/63+20/27 25/21+20/81