Add 56/21 and 42/9
1st number: 2 14/21, 2nd number: 4 6/9
56/21 + 42/9 is 22/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
56/21 = 56 × 3/21 × 3 = 168/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
42/9 = 42 × 7/9 × 7 = 294/63 - Add the two like fractions:
168/63 + 294/63 = 168 + 294/63 = 462/63 - 462/63 simplified gives 22/3
- So, 56/21 + 42/9 = 22/3
In mixed form: 71/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21+84/9 56/42+42/9 56/21+42/18 56/63+42/9 56/21+42/27 56/21+42/45 56/21+42/63