Subtract 21/45 from 6/63
6/63 - 21/45 is -13/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 63 × 5 = 315,
6/63 = 6 × 5/63 × 5 = 30/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
21/45 = 21 × 7/45 × 7 = 147/315 - Subtract the two like fractions:
30/315 - 147/315 = 30 - 147/315 = -117/315 - After reducing the fraction, the answer is -13/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/63-21/45 6/63-42/45 6/63-21/90 18/63-21/45 6/63-63/45 30/63-21/45 42/63-21/45