Add 40/8 and 21/15
1st number: 5 0/8, 2nd number: 1 6/15
40/8 + 21/15 is 32/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 15 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 8 × 15 = 120,
40/8 = 40 × 15/8 × 15 = 600/120 - Likewise, for the 2nd fraction, since 15 × 8 = 120,
21/15 = 21 × 8/15 × 8 = 168/120 - Add the two like fractions:
600/120 + 168/120 = 600 + 168/120 = 768/120 - 768/120 simplified gives 32/5
- So, 40/8 + 21/15 = 32/5
In mixed form: 62/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/8+21/15 40/8+42/15 40/16+21/15 40/8+21/30 40/8+63/15 40/24+21/15 40/8+21/45 40/8+21/75 40/56+21/15