Subtract 2/45 from 21/63
21/63 - 2/45 is 13/45.
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,
21/63 = 21 × 5/63 × 5 = 105/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
2/45 = 2 × 7/45 × 7 = 14/315 - Subtract the two like fractions:
105/315 - 14/315 = 105 - 14/315 = 91/315 - After reducing the fraction, the answer is 13/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/63-2/45 21/63-4/45 21/63-2/90 21/63-6/45 21/63-10/45 21/63-14/45