Add 56/21 and 18/9
1st number: 2 14/21, 2nd number: 2 0/9
56/21 + 18/9 is 14/3.
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,
18/9 = 18 × 7/9 × 7 = 126/63 - Add the two like fractions:
168/63 + 126/63 = 168 + 126/63 = 294/63 - 294/63 simplified gives 14/3
- So, 56/21 + 18/9 = 14/3
In mixed form: 42/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21+36/9 56/42+18/9 56/21+54/9 56/63+18/9 56/21+18/27 56/21+90/9 56/21+18/45 56/21+18/63