Add 24/21 and 42/9
1st number: 1 3/21, 2nd number: 4 6/9
24/21 + 42/9 is 122/21.
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,
24/21 = 24 × 3/21 × 3 = 72/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
42/9 = 42 × 7/9 × 7 = 294/63 - Add the two like fractions:
72/63 + 294/63 = 72 + 294/63 = 366/63 - 366/63 simplified gives 122/21
- So, 24/21 + 42/9 = 122/21
In mixed form: 517/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/21+42/9 24/21+84/9 24/42+42/9 24/21+42/18 72/21+42/9 24/63+42/9 24/21+42/27 24/21+42/45 24/21+42/63