Subtract 4/21 from 10/75
10/75 - 4/21 is -2/35.
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,
10/75 = 10 × 7/75 × 7 = 70/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
4/21 = 4 × 25/21 × 25 = 100/525 - Subtract the two like fractions:
70/525 - 100/525 = 70 - 100/525 = -30/525 - After reducing the fraction, the answer is -2/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/75-4/21 10/75-8/21 10/75-4/42 30/75-4/21 10/75-12/21 10/75-4/63 50/75-4/21 10/75-20/21 70/75-4/21 10/75-28/21