Add 40/8 and 54/15
1st number: 5 0/8, 2nd number: 3 9/15
40/8 + 54/15 is 43/5.
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,
54/15 = 54 × 8/15 × 8 = 432/120 - Add the two like fractions:
600/120 + 432/120 = 600 + 432/120 = 1032/120 - 1032/120 simplified gives 43/5
- So, 40/8 + 54/15 = 43/5
In mixed form: 83/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/8+54/15 40/16+54/15 40/8+54/30 40/24+54/15 40/8+54/45 40/8+54/75 40/56+54/15