Add 21/20 and 81/14
1st number: 1 1/20, 2nd number: 5 11/14
21/20 + 81/14 is 957/140.
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,
81/14 = 81 × 10/14 × 10 = 810/140 - Add the two like fractions:
147/140 + 810/140 = 147 + 810/140 = 957/140 - So, 21/20 + 81/14 = 957/140
In mixed form: 6117/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/20+81/14 21/40+81/14 21/20+81/28 63/20+81/14 21/60+81/14 21/20+81/42 21/20+81/70 21/20+81/98