Add 75/72 and 21/18
1st number: 1 3/72, 2nd number: 1 3/18
75/72 + 21/18 is 53/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 18 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
75/72 = 75 × 1/72 × 1 = 75/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
21/18 = 21 × 4/18 × 4 = 84/72 - Add the two like fractions:
75/72 + 84/72 = 75 + 84/72 = 159/72 - 159/72 simplified gives 53/24
- So, 75/72 + 21/18 = 53/24
In mixed form: 25/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/72+42/18 75/72+21/36 75/72+63/18 75/72+21/54 75/72+21/90