Add 21/18 and 56/5
1st number: 1 3/18, 2nd number: 11 1/5
21/18 + 56/5 is 371/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 5 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 5 × 18 = 90,
56/5 = 56 × 18/5 × 18 = 1008/90 - Add the two like fractions:
105/90 + 1008/90 = 105 + 1008/90 = 1113/90 - 1113/90 simplified gives 371/30
- So, 21/18 + 56/5 = 371/30
In mixed form: 1211/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/18+56/5 21/36+56/5 21/18+56/10 63/18+56/5 21/54+56/5 21/18+56/15 21/90+56/5 21/18+56/25 21/18+56/35