Add 28/14 and 21/5
1st number: 2 0/14, 2nd number: 4 1/5
28/14 + 21/5 is 31/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 5 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 14 × 5 = 70,
28/14 = 28 × 5/14 × 5 = 140/70 - Likewise, for the 2nd fraction, since 5 × 14 = 70,
21/5 = 21 × 14/5 × 14 = 294/70 - Add the two like fractions:
140/70 + 294/70 = 140 + 294/70 = 434/70 - 434/70 simplified gives 31/5
- So, 28/14 + 21/5 = 31/5
In mixed form: 61/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/14+21/5 28/14+42/5 28/14+21/10 84/14+21/5 28/14+63/5 28/42+21/5 28/14+21/15 28/70+21/5 28/14+21/25 28/98+21/5 28/14+21/35