Add 98/7 and 21/40
1st number: 14 0/7, 2nd number: 21/40
98/7 + 21/40 is 581/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 7 × 40 = 280,
98/7 = 98 × 40/7 × 40 = 3920/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
21/40 = 21 × 7/40 × 7 = 147/280 - Add the two like fractions:
3920/280 + 147/280 = 3920 + 147/280 = 4067/280 - 4067/280 simplified gives 581/40
- So, 98/7 + 21/40 = 581/40
In mixed form: 1421/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/7+42/40 98/14+21/40 98/7+21/80 98/7+63/40 98/21+21/40 98/35+21/40 98/49+21/40