Add 72/27 and 9/7
1st number: 2 18/27, 2nd number: 1 2/7
72/27 + 9/7 is 83/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 7 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 27 × 7 = 189,
72/27 = 72 × 7/27 × 7 = 504/189 - Likewise, for the 2nd fraction, since 7 × 27 = 189,
9/7 = 9 × 27/7 × 27 = 243/189 - Add the two like fractions:
504/189 + 243/189 = 504 + 243/189 = 747/189 - 747/189 simplified gives 83/21
- So, 72/27 + 9/7 = 83/21
In mixed form: 320/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/27+18/7 72/54+9/7 72/27+9/14 72/27+27/7 72/81+9/7 72/27+9/21 72/27+45/7 72/27+9/35 72/27+63/7 72/27+9/49