Add 16/21 and 42/9
1st number: 16/21, 2nd number: 4 6/9
16/21 + 42/9 is 38/7.
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,
16/21 = 16 × 3/21 × 3 = 48/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
42/9 = 42 × 7/9 × 7 = 294/63 - Add the two like fractions:
48/63 + 294/63 = 48 + 294/63 = 342/63 - 342/63 simplified gives 38/7
- So, 16/21 + 42/9 = 38/7
In mixed form: 53/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/21+42/9 16/21+84/9 16/42+42/9 16/21+42/18 48/21+42/9 16/63+42/9 16/21+42/27 80/21+42/9 16/21+42/45 16/21+42/63