Add 63/21 and 42/9
1st number: 3 0/21, 2nd number: 4 6/9
63/21 + 42/9 is 23/3.
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,
63/21 = 63 × 3/21 × 3 = 189/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
42/9 = 42 × 7/9 × 7 = 294/63 - Add the two like fractions:
189/63 + 294/63 = 189 + 294/63 = 483/63 - 483/63 simplified gives 23/3
- So, 63/21 + 42/9 = 23/3
In mixed form: 72/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/21+84/9 63/42+42/9 63/21+42/18 63/21+42/27 63/21+42/45 63/21+42/63