Add 15/3 and 81/72
1st number: 5 0/3, 2nd number: 1 9/72
15/3 + 81/72 is 49/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 3 × 24 = 72,
15/3 = 15 × 24/3 × 24 = 360/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
81/72 = 81 × 1/72 × 1 = 81/72 - Add the two like fractions:
360/72 + 81/72 = 360 + 81/72 = 441/72 - 441/72 simplified gives 49/8
- So, 15/3 + 81/72 = 49/8
In mixed form: 61/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/3+81/72 15/6+81/72 45/3+81/72 15/9+81/72 75/3+81/72 15/21+81/72