Add 42/21 and 1/9
1st number: 2 0/21, 2nd number: 1/9
42/21 + 1/9 is 19/9.
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,
42/21 = 42 × 3/21 × 3 = 126/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
1/9 = 1 × 7/9 × 7 = 7/63 - Add the two like fractions:
126/63 + 7/63 = 126 + 7/63 = 133/63 - 133/63 simplified gives 19/9
- So, 42/21 + 1/9 = 19/9
In mixed form: 21/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+1/9 42/21+2/9 42/21+1/18 42/21+3/9 42/63+1/9 42/21+1/27 42/21+5/9 42/21+1/45 42/21+7/9 42/21+1/63