Subtract 21/63 from 8/49
8/49 - 21/63 is -25/147.
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,
8/49 = 8 × 9/49 × 9 = 72/441 - Likewise, for the 2nd fraction, since 63 × 7 = 441,
21/63 = 21 × 7/63 × 7 = 147/441 - Subtract the two like fractions:
72/441 - 147/441 = 72 - 147/441 = -75/441 - After reducing the fraction, the answer is -25/147
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/49-21/63 8/49-42/63 8/98-21/63 24/49-21/63 40/49-21/63 56/49-21/63