Add 75/9 and 12/21
1st number: 8 3/9, 2nd number: 12/21
75/9 + 12/21 is 187/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
75/9 = 75 × 7/9 × 7 = 525/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
12/21 = 12 × 3/21 × 3 = 36/63 - Add the two like fractions:
525/63 + 36/63 = 525 + 36/63 = 561/63 - 561/63 simplified gives 187/21
- So, 75/9 + 12/21 = 187/21
In mixed form: 819/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/9+24/21 75/18+12/21 75/9+12/42 75/9+36/21 75/27+12/21 75/9+12/63 75/9+60/21 75/45+12/21 75/9+84/21 75/63+12/21