Subtract 21/63 from 25/35
25/35 - 21/63 is 8/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 63 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 35 × 9 = 315,
25/35 = 25 × 9/35 × 9 = 225/315 - Likewise, for the 2nd fraction, since 63 × 5 = 315,
21/63 = 21 × 5/63 × 5 = 105/315 - Subtract the two like fractions:
225/315 - 105/315 = 225 - 105/315 = 120/315 - After reducing the fraction, the answer is 8/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/35-21/63 25/35-42/63 25/70-21/63 75/35-21/63