Add 28/24 and 21/30
1st number: 1 4/24, 2nd number: 21/30
28/24 + 21/30 is 28/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 30 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 24 × 5 = 120,
28/24 = 28 × 5/24 × 5 = 140/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
21/30 = 21 × 4/30 × 4 = 84/120 - Add the two like fractions:
140/120 + 84/120 = 140 + 84/120 = 224/120 - 224/120 simplified gives 28/15
- So, 28/24 + 21/30 = 28/15
In mixed form: 113/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/24+21/30 28/24+42/30 28/48+21/30 28/24+21/60 84/24+21/30 28/24+63/30 28/72+21/30 28/24+21/90