Add 72/45 and 60/20
1st number: 1 27/45, 2nd number: 3 0/20
72/45 + 60/20 is 23/5.
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,
72/45 = 72 × 4/45 × 4 = 288/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
60/20 = 60 × 9/20 × 9 = 540/180 - Add the two like fractions:
288/180 + 540/180 = 288 + 540/180 = 828/180 - 828/180 simplified gives 23/5
- So, 72/45 + 60/20 = 23/5
In mixed form: 43/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/90+60/20 72/45+60/40