Add 40/7 and 9/20
1st number: 5 5/7, 2nd number: 9/20
40/7 + 9/20 is 863/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
40/7 = 40 × 20/7 × 20 = 800/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
9/20 = 9 × 7/20 × 7 = 63/140 - Add the two like fractions:
800/140 + 63/140 = 800 + 63/140 = 863/140 - So, 40/7 + 9/20 = 863/140
In mixed form: 623/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/7+9/20 40/7+18/20 40/14+9/20 40/7+9/40 40/7+27/20 40/21+9/20 40/7+9/60 40/7+45/20 40/35+9/20 40/7+63/20 40/49+9/20