Add 42/21 and 35/12
1st number: 2 0/21, 2nd number: 2 11/12
42/21 + 35/12 is 59/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
42/21 = 42 × 4/21 × 4 = 168/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
35/12 = 35 × 7/12 × 7 = 245/84 - Add the two like fractions:
168/84 + 245/84 = 168 + 245/84 = 413/84 - 413/84 simplified gives 59/12
- So, 42/21 + 35/12 = 59/12
In mixed form: 411/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+35/12 42/21+70/12 42/21+35/24 42/63+35/12 42/21+35/36 42/21+35/60 42/21+35/84