Subtract 21/63 from 25/56
25/56 - 21/63 is 19/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 63 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 56 × 9 = 504,
25/56 = 25 × 9/56 × 9 = 225/504 - Likewise, for the 2nd fraction, since 63 × 8 = 504,
21/63 = 21 × 8/63 × 8 = 168/504 - Subtract the two like fractions:
225/504 - 168/504 = 225 - 168/504 = 57/504 - After reducing the fraction, the answer is 19/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/56-21/63 25/56-42/63 75/56-21/63