Add 8/21 and 42/9
1st number: 8/21, 2nd number: 4 6/9
8/21 + 42/9 is 106/21.
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,
8/21 = 8 × 3/21 × 3 = 24/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
42/9 = 42 × 7/9 × 7 = 294/63 - Add the two like fractions:
24/63 + 294/63 = 24 + 294/63 = 318/63 - 318/63 simplified gives 106/21
- So, 8/21 + 42/9 = 106/21
In mixed form: 51/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/21+42/9 8/21+84/9 8/42+42/9 8/21+42/18 24/21+42/9 8/63+42/9 8/21+42/27 40/21+42/9 8/21+42/45 56/21+42/9 8/21+42/63