Subtract 21/72 from 9/2
1st number: 4 1/2, 2nd number: 21/72
9/2 - 21/72 is 101/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 2 × 36 = 72,
9/2 = 9 × 36/2 × 36 = 324/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
21/72 = 21 × 1/72 × 1 = 21/72 - Subtract the two like fractions:
324/72 - 21/72 = 324 - 21/72 = 303/72 - After reducing the fraction, the answer is 101/24
- In mixed form: 45/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/2-21/72 9/2-42/72 9/4-21/72 27/2-21/72 9/2-63/72 9/6-21/72 45/2-21/72 9/10-21/72 63/2-21/72 9/14-21/72