Add 90/3 and 21/4
1st number: 30 0/3, 2nd number: 5 1/4
90/3 + 21/4 is 141/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 4 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 3 × 4 = 12,
90/3 = 90 × 4/3 × 4 = 360/12 - Likewise, for the 2nd fraction, since 4 × 3 = 12,
21/4 = 21 × 3/4 × 3 = 63/12 - Add the two like fractions:
360/12 + 63/12 = 360 + 63/12 = 423/12 - 423/12 simplified gives 141/4
- So, 90/3 + 21/4 = 141/4
In mixed form: 351/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/3+42/4 90/6+21/4 90/3+21/8 90/3+63/4 90/9+21/4 90/3+21/12 90/15+21/4 90/3+21/20 90/21+21/4 90/3+21/28