Add 4/30 and 21/18
1st number: 4/30, 2nd number: 1 3/18
4/30 + 21/18 is 13/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
4/30 = 4 × 3/30 × 3 = 12/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
21/18 = 21 × 5/18 × 5 = 105/90 - Add the two like fractions:
12/90 + 105/90 = 12 + 105/90 = 117/90 - 117/90 simplified gives 13/10
- So, 4/30 + 21/18 = 13/10
In mixed form: 13/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/30+21/18 4/30+42/18 4/60+21/18 4/30+21/36 12/30+21/18 4/30+63/18 4/90+21/18 4/30+21/54 20/30+21/18 4/30+21/90 28/30+21/18