Add 72/27 and 42/20
1st number: 2 18/27, 2nd number: 2 2/20
72/27 + 42/20 is 143/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 20 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 27 × 20 = 540,
72/27 = 72 × 20/27 × 20 = 1440/540 - Likewise, for the 2nd fraction, since 20 × 27 = 540,
42/20 = 42 × 27/20 × 27 = 1134/540 - Add the two like fractions:
1440/540 + 1134/540 = 1440 + 1134/540 = 2574/540 - 2574/540 simplified gives 143/30
- So, 72/27 + 42/20 = 143/30
In mixed form: 423/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/27+84/20 72/54+42/20 72/27+42/40 72/81+42/20 72/27+42/60