Subtract 3/75 from 21/12
1st number: 1 9/12, 2nd number: 3/75
21/12 - 3/75 is 171/100.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 75 is 300
Next, find the equivalent fraction of both fractional numbers with denominator 300 - For the 1st fraction, since 12 × 25 = 300,
21/12 = 21 × 25/12 × 25 = 525/300 - Likewise, for the 2nd fraction, since 75 × 4 = 300,
3/75 = 3 × 4/75 × 4 = 12/300 - Subtract the two like fractions:
525/300 - 12/300 = 525 - 12/300 = 513/300 - After reducing the fraction, the answer is 171/100
- In mixed form: 171/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12-3/75 21/12-6/75 21/24-3/75 63/12-3/75 21/12-9/75 21/36-3/75 21/12-15/75 21/60-3/75 21/12-21/75 21/84-3/75