Add 21/14 and 27/20
1st number: 1 7/14, 2nd number: 1 7/20
21/14 + 27/20 is 57/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 14 × 10 = 140,
21/14 = 21 × 10/14 × 10 = 210/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
27/20 = 27 × 7/20 × 7 = 189/140 - Add the two like fractions:
210/140 + 189/140 = 210 + 189/140 = 399/140 - 399/140 simplified gives 57/20
- So, 21/14 + 27/20 = 57/20
In mixed form: 217/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14+27/20 21/14+54/20 21/28+27/20 21/14+27/40 63/14+27/20 21/14+81/20 21/42+27/20 21/14+27/60 21/70+27/20 21/98+27/20