Subtract 63/21 from 15/5
1st number: 3 0/5, 2nd number: 3 0/21
15/5 - 63/21 is 0/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 5 × 21 = 105,
15/5 = 15 × 21/5 × 21 = 315/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
63/21 = 63 × 5/21 × 5 = 315/105 - Subtract the two like fractions:
315/105 - 315/105 = 315 - 315/105 = 0/105 - The answer is 0
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/5-63/21 15/10-63/21 15/5-63/42 45/5-63/21 75/5-63/21 15/25-63/21 15/35-63/21