Subtract 9/63 from 21/25
21/25 - 9/63 is 122/175.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 63 is 1575
Next, find the equivalent fraction of both fractional numbers with denominator 1575 - For the 1st fraction, since 25 × 63 = 1575,
21/25 = 21 × 63/25 × 63 = 1323/1575 - Likewise, for the 2nd fraction, since 63 × 25 = 1575,
9/63 = 9 × 25/63 × 25 = 225/1575 - Subtract the two like fractions:
1323/1575 - 225/1575 = 1323 - 225/1575 = 1098/1575 - After reducing the fraction, the answer is 122/175
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/25-9/63 21/25-18/63 21/50-9/63 63/25-9/63 21/25-27/63 21/75-9/63 21/25-45/63