Subtract 45/21 from 45/6
1st number: 7 3/6, 2nd number: 2 3/21
45/6 - 45/21 is 75/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
45/6 = 45 × 7/6 × 7 = 315/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
45/21 = 45 × 2/21 × 2 = 90/42 - Subtract the two like fractions:
315/42 - 90/42 = 315 - 90/42 = 225/42 - After reducing the fraction, the answer is 75/14
- In mixed form: 55/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/6-45/21 45/6-90/21 45/12-45/21 45/6-45/42 45/18-45/21 45/6-45/63 45/30-45/21 45/42-45/21