Add 75/12 and 9/21
1st number: 6 3/12, 2nd number: 9/21
75/12 + 9/21 is 187/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
75/12 = 75 × 7/12 × 7 = 525/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
9/21 = 9 × 4/21 × 4 = 36/84 - Add the two like fractions:
525/84 + 36/84 = 525 + 36/84 = 561/84 - 561/84 simplified gives 187/28
- So, 75/12 + 9/21 = 187/28
In mixed form: 619/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/12+18/21 75/24+9/21 75/12+9/42 75/12+27/21 75/36+9/21 75/12+9/63 75/12+45/21 75/60+9/21 75/12+63/21 75/84+9/21