Add 20/21 and 75/27
1st number: 20/21, 2nd number: 2 21/27
20/21 + 75/27 is 235/63.
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,
20/21 = 20 × 9/21 × 9 = 180/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
75/27 = 75 × 7/27 × 7 = 525/189 - Add the two like fractions:
180/189 + 525/189 = 180 + 525/189 = 705/189 - 705/189 simplified gives 235/63
- So, 20/21 + 75/27 = 235/63
In mixed form: 346/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21+75/27 20/42+75/27 20/21+75/54 60/21+75/27 20/63+75/27 20/21+75/81