Subtract 1/25 from 3/21
3/21 - 1/25 is 18/175.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 25 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 21 × 25 = 525,
3/21 = 3 × 25/21 × 25 = 75/525 - Likewise, for the 2nd fraction, since 25 × 21 = 525,
1/25 = 1 × 21/25 × 21 = 21/525 - Subtract the two like fractions:
75/525 - 21/525 = 75 - 21/525 = 54/525 - After reducing the fraction, the answer is 18/175
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/21-1/25 3/21-2/25 3/42-1/25 3/21-1/50 9/21-1/25 3/21-3/25 3/63-1/25 3/21-1/75 15/21-1/25 3/21-5/25 3/21-7/25