Add 20/12 and 21/14
1st number: 1 8/12, 2nd number: 1 7/14
20/12 + 21/14 is 19/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 14 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
20/12 = 20 × 7/12 × 7 = 140/84 - Likewise, for the 2nd fraction, since 14 × 6 = 84,
21/14 = 21 × 6/14 × 6 = 126/84 - Add the two like fractions:
140/84 + 126/84 = 140 + 126/84 = 266/84 - 266/84 simplified gives 19/6
- So, 20/12 + 21/14 = 19/6
In mixed form: 31/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/12+21/14 20/12+42/14 20/24+21/14 20/12+21/28 60/12+21/14 20/12+63/14 20/36+21/14 20/12+21/42 20/60+21/14 20/12+21/70 20/84+21/14 20/12+21/98