Add 75/9 and 70/21
1st number: 8 3/9, 2nd number: 3 7/21
75/9 + 70/21 is 35/3.
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,
70/21 = 70 × 3/21 × 3 = 210/63 - Add the two like fractions:
525/63 + 210/63 = 525 + 210/63 = 735/63 - 735/63 simplified gives 35/3
- So, 75/9 + 70/21 = 35/3
In mixed form: 112/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/18+70/21 75/9+70/42 75/27+70/21 75/9+70/63 75/45+70/21 75/63+70/21