Add 21/90 and 50/45
1st number: 21/90, 2nd number: 1 5/45
21/90 + 50/45 is 121/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
21/90 = 21 × 1/90 × 1 = 21/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
50/45 = 50 × 2/45 × 2 = 100/90 - Add the two like fractions:
21/90 + 100/90 = 21 + 100/90 = 121/90 - So, 21/90 + 50/45 = 121/90
In mixed form: 131/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/90+50/45 21/90+50/90 63/90+50/45