Add 15/8 and 40/7
1st number: 1 7/8, 2nd number: 5 5/7
15/8 + 40/7 is 425/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 7 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 8 × 7 = 56,
15/8 = 15 × 7/8 × 7 = 105/56 - Likewise, for the 2nd fraction, since 7 × 8 = 56,
40/7 = 40 × 8/7 × 8 = 320/56 - Add the two like fractions:
105/56 + 320/56 = 105 + 320/56 = 425/56 - So, 15/8 + 40/7 = 425/56
In mixed form: 733/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/8+40/7 15/8+80/7 15/16+40/7 15/8+40/14 45/8+40/7 15/24+40/7 15/8+40/21 75/8+40/7 15/40+40/7 15/8+40/35 15/56+40/7 15/8+40/49