Add 28/21 and 98/30
1st number: 1 7/21, 2nd number: 3 8/30
28/21 + 98/30 is 23/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
28/21 = 28 × 10/21 × 10 = 280/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
98/30 = 98 × 7/30 × 7 = 686/210 - Add the two like fractions:
280/210 + 686/210 = 280 + 686/210 = 966/210 - 966/210 simplified gives 23/5
- So, 28/21 + 98/30 = 23/5
In mixed form: 43/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21+98/30 28/42+98/30 28/21+98/60 84/21+98/30 28/63+98/30 28/21+98/90