Add 21/14 and 28/63
1st number: 1 7/14, 2nd number: 28/63
21/14 + 28/63 is 35/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 63 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 14 × 9 = 126,
21/14 = 21 × 9/14 × 9 = 189/126 - Likewise, for the 2nd fraction, since 63 × 2 = 126,
28/63 = 28 × 2/63 × 2 = 56/126 - Add the two like fractions:
189/126 + 56/126 = 189 + 56/126 = 245/126 - 245/126 simplified gives 35/18
- So, 21/14 + 28/63 = 35/18
In mixed form: 117/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14+28/63 21/14+56/63 21/28+28/63 63/14+28/63 21/14+84/63 21/42+28/63 21/70+28/63 21/98+28/63