Subtract 20/7 from 45/6
1st number: 7 3/6, 2nd number: 2 6/7
45/6 - 20/7 is 65/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 7 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 7 × 6 = 42,
20/7 = 20 × 6/7 × 6 = 120/42 - Subtract the two like fractions:
315/42 - 120/42 = 315 - 120/42 = 195/42 - After reducing the fraction, the answer is 65/14
- In mixed form: 49/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/6-20/7 45/6-40/7 45/12-20/7 45/6-20/14 45/6-60/7 45/18-20/7 45/6-20/21 45/30-20/7 45/6-20/35 45/42-20/7 45/6-20/49