Subtract 3/15 from 63/21
1st number: 3 0/21, 2nd number: 3/15
63/21 - 3/15 is 14/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 15 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
63/21 = 63 × 5/21 × 5 = 315/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
3/15 = 3 × 7/15 × 7 = 21/105 - Subtract the two like fractions:
315/105 - 21/105 = 315 - 21/105 = 294/105 - After reducing the fraction, the answer is 14/5
- In mixed form: 24/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/21-6/15 63/42-3/15 63/21-3/30 63/21-9/15 63/21-3/45 63/21-3/75 63/21-21/15