Add 21/20 and 72/14
1st number: 1 1/20, 2nd number: 5 2/14
21/20 + 72/14 is 867/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 14 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
21/20 = 21 × 7/20 × 7 = 147/140 - Likewise, for the 2nd fraction, since 14 × 10 = 140,
72/14 = 72 × 10/14 × 10 = 720/140 - Add the two like fractions:
147/140 + 720/140 = 147 + 720/140 = 867/140 - So, 21/20 + 72/14 = 867/140
In mixed form: 627/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/20+72/14 21/40+72/14 21/20+72/28 63/20+72/14 21/60+72/14 21/20+72/42 21/20+72/70 21/20+72/98