Add 9/20 and 21/14
1st number: 9/20, 2nd number: 1 7/14
9/20 + 21/14 is 39/20.
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,
9/20 = 9 × 7/20 × 7 = 63/140 - Likewise, for the 2nd fraction, since 14 × 10 = 140,
21/14 = 21 × 10/14 × 10 = 210/140 - Add the two like fractions:
63/140 + 210/140 = 63 + 210/140 = 273/140 - 273/140 simplified gives 39/20
- So, 9/20 + 21/14 = 39/20
In mixed form: 119/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/20+21/14 9/20+42/14 9/40+21/14 9/20+21/28 27/20+21/14 9/20+63/14 9/60+21/14 9/20+21/42 45/20+21/14 9/20+21/70 63/20+21/14 9/20+21/98