Add 5/45 and 45/20
1st number: 5/45, 2nd number: 2 5/20
5/45 + 45/20 is 85/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
5/45 = 5 × 4/45 × 4 = 20/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
45/20 = 45 × 9/20 × 9 = 405/180 - Add the two like fractions:
20/180 + 405/180 = 20 + 405/180 = 425/180 - 425/180 simplified gives 85/36
- So, 5/45 + 45/20 = 85/36
In mixed form: 213/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/45+45/20 5/45+90/20 5/90+45/20 5/45+45/40 15/45+45/20 5/45+45/60 25/45+45/20 35/45+45/20