Add 72/45 and 21/60
1st number: 1 27/45, 2nd number: 21/60
72/45 + 21/60 is 39/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 60 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 60 × 3 = 180,
21/60 = 21 × 3/60 × 3 = 63/180 - Add the two like fractions:
288/180 + 63/180 = 288 + 63/180 = 351/180 - 351/180 simplified gives 39/20
- So, 72/45 + 21/60 = 39/20
In mixed form: 119/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/45+42/60 72/90+21/60 72/45+63/60