Subtract 45/15 from 14/21
1st number: 14/21, 2nd number: 3 0/15
14/21 - 45/15 is -7/3.
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,
14/21 = 14 × 5/21 × 5 = 70/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
45/15 = 45 × 7/15 × 7 = 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: 28/21-45/15 14/21-90/15 14/42-45/15 14/21-45/30 42/21-45/15 14/63-45/15 70/21-45/15 14/21-45/75 98/21-45/15