Add 21/18 and 49/45
1st number: 1 3/18, 2nd number: 1 4/45
21/18 + 49/45 is 203/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
21/18 = 21 × 5/18 × 5 = 105/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
49/45 = 49 × 2/45 × 2 = 98/90 - Add the two like fractions:
105/90 + 98/90 = 105 + 98/90 = 203/90 - So, 21/18 + 49/45 = 203/90
In mixed form: 223/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/18+49/45 21/18+98/45 21/36+49/45 21/18+49/90 63/18+49/45 21/54+49/45 21/90+49/45