Add 90/4 and 21/45
1st number: 22 2/4, 2nd number: 21/45
90/4 + 21/45 is 689/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 4 × 45 = 180,
90/4 = 90 × 45/4 × 45 = 4050/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
21/45 = 21 × 4/45 × 4 = 84/180 - Add the two like fractions:
4050/180 + 84/180 = 4050 + 84/180 = 4134/180 - 4134/180 simplified gives 689/30
- So, 90/4 + 21/45 = 689/30
In mixed form: 2229/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/4+42/45 90/8+21/45 90/4+21/90 90/4+63/45 90/12+21/45 90/20+21/45 90/28+21/45