Add 72/20 and 45/36
1st number: 3 12/20, 2nd number: 1 9/36
72/20 + 45/36 is 97/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
72/20 = 72 × 9/20 × 9 = 648/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
45/36 = 45 × 5/36 × 5 = 225/180 - Add the two like fractions:
648/180 + 225/180 = 648 + 225/180 = 873/180 - 873/180 simplified gives 97/20
- So, 72/20 + 45/36 = 97/20
In mixed form: 417/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/20+90/36 72/40+45/36 72/20+45/72 72/60+45/36