Subtract 20/42 from 45/6
1st number: 7 3/6, 2nd number: 20/42
45/6 - 20/42 is 295/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 42 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 42 × 1 = 42,
20/42 = 20 × 1/42 × 1 = 20/42 - Subtract the two like fractions:
315/42 - 20/42 = 315 - 20/42 = 295/42 - In mixed form: 71/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/6-20/42 45/6-40/42 45/12-20/42 45/6-20/84 45/6-60/42 45/18-20/42 45/30-20/42 45/42-20/42