Add 90/5 and 21/18
1st number: 18 0/5, 2nd number: 1 3/18
90/5 + 21/18 is 115/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
90/5 = 90 × 18/5 × 18 = 1620/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
21/18 = 21 × 5/18 × 5 = 105/90 - Add the two like fractions:
1620/90 + 105/90 = 1620 + 105/90 = 1725/90 - 1725/90 simplified gives 115/6
- So, 90/5 + 21/18 = 115/6
In mixed form: 191/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/5+42/18 90/10+21/18 90/5+21/36 90/5+63/18 90/15+21/18 90/5+21/54 90/25+21/18 90/5+21/90 90/35+21/18