Subtract 63/15 from 6/21
1st number: 6/21, 2nd number: 4 3/15
6/21 - 63/15 is -137/35.
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,
6/21 = 6 × 5/21 × 5 = 30/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
63/15 = 63 × 7/15 × 7 = 441/105 - Subtract the two like fractions:
30/105 - 441/105 = 30 - 441/105 = -411/105 - After reducing the fraction, the answer is -137/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21-63/15 6/42-63/15 6/21-63/30 18/21-63/15 6/63-63/15 6/21-63/45 30/21-63/15 6/21-63/75 42/21-63/15