Add 21/3 and 63/56
1st number: 7 0/3, 2nd number: 1 7/56
21/3 + 63/56 is 65/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 3 × 56 = 168,
21/3 = 21 × 56/3 × 56 = 1176/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
63/56 = 63 × 3/56 × 3 = 189/168 - Add the two like fractions:
1176/168 + 189/168 = 1176 + 189/168 = 1365/168 - 1365/168 simplified gives 65/8
- So, 21/3 + 63/56 = 65/8
In mixed form: 81/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/3+63/56 21/6+63/56 63/3+63/56 21/9+63/56 21/15+63/56