Subtract 24/63 from 21/49
21/49 - 24/63 is 1/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 63 is 441
Next, find the equivalent fraction of both fractional numbers with denominator 441 - For the 1st fraction, since 49 × 9 = 441,
21/49 = 21 × 9/49 × 9 = 189/441 - Likewise, for the 2nd fraction, since 63 × 7 = 441,
24/63 = 24 × 7/63 × 7 = 168/441 - Subtract the two like fractions:
189/441 - 168/441 = 189 - 168/441 = 21/441 - After reducing the fraction, the answer is 1/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/49-24/63 21/49-48/63 21/98-24/63 63/49-24/63 21/49-72/63