Subtract 63/21 from 10/15
1st number: 10/15, 2nd number: 3 0/21
10/15 - 63/21 is -7/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
10/15 = 10 × 7/15 × 7 = 70/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
63/21 = 63 × 5/21 × 5 = 315/105 - Subtract the two like fractions:
70/105 - 315/105 = 70 - 315/105 = -245/105 - After reducing the fraction, the answer is -7/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/15-63/21 10/30-63/21 10/15-63/42 30/15-63/21 10/45-63/21 50/15-63/21 10/75-63/21 70/15-63/21