Add 5/4 and 20/45
1st number: 1 1/4, 2nd number: 20/45
5/4 + 20/45 is 61/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 4 × 45 = 180,
5/4 = 5 × 45/4 × 45 = 225/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
20/45 = 20 × 4/45 × 4 = 80/180 - Add the two like fractions:
225/180 + 80/180 = 225 + 80/180 = 305/180 - 305/180 simplified gives 61/36
- So, 5/4 + 20/45 = 61/36
In mixed form: 125/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/4+20/45 5/4+40/45 5/8+20/45 5/4+20/90 15/4+20/45 5/4+60/45 5/12+20/45 25/4+20/45 5/20+20/45 35/4+20/45 5/28+20/45