Add 20/18 and 4/45
1st number: 1 2/18, 2nd number: 4/45
20/18 + 4/45 is 6/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
20/18 = 20 × 5/18 × 5 = 100/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
4/45 = 4 × 2/45 × 2 = 8/90 - Add the two like fractions:
100/90 + 8/90 = 100 + 8/90 = 108/90 - 108/90 simplified gives 6/5
- So, 20/18 + 4/45 = 6/5
In mixed form: 11/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/18+4/45 20/18+8/45 20/36+4/45 20/18+4/90 60/18+4/45 20/18+12/45 20/54+4/45 20/18+20/45 20/90+4/45 20/18+28/45