Add 72/45 and 21/24
1st number: 1 27/45, 2nd number: 21/24
72/45 + 21/24 is 99/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 24 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
72/45 = 72 × 8/45 × 8 = 576/360 - Likewise, for the 2nd fraction, since 24 × 15 = 360,
21/24 = 21 × 15/24 × 15 = 315/360 - Add the two like fractions:
576/360 + 315/360 = 576 + 315/360 = 891/360 - 891/360 simplified gives 99/40
- So, 72/45 + 21/24 = 99/40
In mixed form: 219/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/45+42/24 72/90+21/24 72/45+21/48 72/45+63/24 72/45+21/72