Subtract 1/21 from 3/75
3/75 - 1/21 is -4/525.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 21 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 75 × 7 = 525,
3/75 = 3 × 7/75 × 7 = 21/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
1/21 = 1 × 25/21 × 25 = 25/525 - Subtract the two like fractions:
21/525 - 25/525 = 21 - 25/525 = -4/525
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/75-1/21 3/75-2/21 3/75-1/42 9/75-1/21 3/75-3/21 3/75-1/63 15/75-1/21 3/75-5/21 21/75-1/21 3/75-7/21