Add 21/18 and 45/10
1st number: 1 3/18, 2nd number: 4 5/10
21/18 + 45/10 is 17/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 10 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 10 × 9 = 90,
45/10 = 45 × 9/10 × 9 = 405/90 - Add the two like fractions:
105/90 + 405/90 = 105 + 405/90 = 510/90 - 510/90 simplified gives 17/3
- So, 21/18 + 45/10 = 17/3
In mixed form: 52/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/18+45/10 21/18+90/10 21/36+45/10 21/18+45/20 63/18+45/10 21/54+45/10 21/18+45/30 21/90+45/10 21/18+45/50 21/18+45/70