Subtract 1/21 from 7/25
7/25 - 1/21 is 122/525.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 21 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 25 × 21 = 525,
7/25 = 7 × 21/25 × 21 = 147/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
1/21 = 1 × 25/21 × 25 = 25/525 - Subtract the two like fractions:
147/525 - 25/525 = 147 - 25/525 = 122/525
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/25-1/21 7/25-2/21 7/50-1/21 7/25-1/42 21/25-1/21 7/25-3/21 7/75-1/21 7/25-1/63 35/25-1/21 7/25-5/21 49/25-1/21 7/25-7/21