Add 4/8 and 21/30
4/8 + 21/30 is 6/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 30 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 8 × 15 = 120,
4/8 = 4 × 15/8 × 15 = 60/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
21/30 = 21 × 4/30 × 4 = 84/120 - Add the two like fractions:
60/120 + 84/120 = 60 + 84/120 = 144/120 - 144/120 simplified gives 6/5
- So, 4/8 + 21/30 = 6/5
In mixed form: 11/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/8+42/30 4/16+21/30 4/8+21/60 12/8+21/30 4/8+63/30 4/24+21/30 4/8+21/90 20/8+21/30 4/40+21/30 28/8+21/30 4/56+21/30