Add 1/21 and 75/12
1st number: 1/21, 2nd number: 6 3/12
1/21 + 75/12 is 529/84.
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,
1/21 = 1 × 4/21 × 4 = 4/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
75/12 = 75 × 7/12 × 7 = 525/84 - Add the two like fractions:
4/84 + 525/84 = 4 + 525/84 = 529/84 - So, 1/21 + 75/12 = 529/84
In mixed form: 625/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/21+75/12 1/42+75/12 1/21+75/24 3/21+75/12 1/63+75/12 1/21+75/36 5/21+75/12 1/21+75/60 7/21+75/12 1/21+75/84