Subtract 21/63 from 45/15
1st number: 3 0/15, 2nd number: 21/63
45/15 - 21/63 is 8/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 63 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 15 × 21 = 315,
45/15 = 45 × 21/15 × 21 = 945/315 - Likewise, for the 2nd fraction, since 63 × 5 = 315,
21/63 = 21 × 5/63 × 5 = 105/315 - Subtract the two like fractions:
945/315 - 105/315 = 945 - 105/315 = 840/315 - After reducing the fraction, the answer is 8/3
- In mixed form: 22/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/15-21/63 45/15-42/63 45/30-21/63 45/75-21/63