Add 21/18 and 35/90
1st number: 1 3/18, 2nd number: 35/90
21/18 + 35/90 is 14/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 90 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 90 × 1 = 90,
35/90 = 35 × 1/90 × 1 = 35/90 - Add the two like fractions:
105/90 + 35/90 = 105 + 35/90 = 140/90 - 140/90 simplified gives 14/9
- So, 21/18 + 35/90 = 14/9
In mixed form: 15/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/18+35/90 21/18+70/90 21/36+35/90 63/18+35/90 21/54+35/90 21/90+35/90