Add 21/7 and 98/9
1st number: 3 0/7, 2nd number: 10 8/9
21/7 + 98/9 is 125/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,
21/7 = 21 × 9/7 × 9 = 189/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
98/9 = 98 × 7/9 × 7 = 686/63 - Add the two like fractions:
189/63 + 686/63 = 189 + 686/63 = 875/63 - 875/63 simplified gives 125/9
- So, 21/7 + 98/9 = 125/9
In mixed form: 138/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/7+98/9 21/14+98/9 21/7+98/18 63/7+98/9 21/7+98/27 21/35+98/9 21/7+98/45 21/49+98/9 21/7+98/63