Subtract 21/18 from 75/12
1st number: 6 3/12, 2nd number: 1 3/18
75/12 - 21/18 is 61/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 18 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 12 × 3 = 36,
75/12 = 75 × 3/12 × 3 = 225/36 - Likewise, for the 2nd fraction, since 18 × 2 = 36,
21/18 = 21 × 2/18 × 2 = 42/36 - Subtract the two like fractions:
225/36 - 42/36 = 225 - 42/36 = 183/36 - After reducing the fraction, the answer is 61/12
- In mixed form: 51/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/12-42/18 75/24-21/18 75/12-21/36 75/12-63/18 75/36-21/18 75/12-21/54 75/60-21/18 75/12-21/90 75/84-21/18