Add 45/18 and 4/20
1st number: 2 9/18, 2nd number: 4/20
45/18 + 4/20 is 27/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 18 × 10 = 180,
45/18 = 45 × 10/18 × 10 = 450/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
4/20 = 4 × 9/20 × 9 = 36/180 - Add the two like fractions:
450/180 + 36/180 = 450 + 36/180 = 486/180 - 486/180 simplified gives 27/10
- So, 45/18 + 4/20 = 27/10
In mixed form: 27/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/18+4/20 45/18+8/20 45/36+4/20 45/18+4/40 45/18+12/20 45/54+4/20 45/18+4/60 45/90+4/20 45/18+28/20