Add 90/3 and 21/5
1st number: 30 0/3, 2nd number: 4 1/5
90/3 + 21/5 is 171/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 5 is 15
Next, find the equivalent fraction of both fractional numbers with denominator 15 - For the 1st fraction, since 3 × 5 = 15,
90/3 = 90 × 5/3 × 5 = 450/15 - Likewise, for the 2nd fraction, since 5 × 3 = 15,
21/5 = 21 × 3/5 × 3 = 63/15 - Add the two like fractions:
450/15 + 63/15 = 450 + 63/15 = 513/15 - 513/15 simplified gives 171/5
- So, 90/3 + 21/5 = 171/5
In mixed form: 341/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/3+42/5 90/6+21/5 90/3+21/10 90/3+63/5 90/9+21/5 90/3+21/15 90/15+21/5 90/3+21/25 90/21+21/5 90/3+21/35