Add 45/15 and 21/24
1st number: 3 0/15, 2nd number: 21/24
45/15 + 21/24 is 31/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 24 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 15 × 8 = 120,
45/15 = 45 × 8/15 × 8 = 360/120 - Likewise, for the 2nd fraction, since 24 × 5 = 120,
21/24 = 21 × 5/24 × 5 = 105/120 - Add the two like fractions:
360/120 + 105/120 = 360 + 105/120 = 465/120 - 465/120 simplified gives 31/8
- So, 45/15 + 21/24 = 31/8
In mixed form: 37/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/15+21/24 45/15+42/24 45/30+21/24 45/15+21/48 45/15+63/24 45/15+21/72 45/75+21/24