Subtract 45/18 from 1/7
1st number: 1/7, 2nd number: 2 9/18
1/7 - 45/18 is -33/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 7 × 18 = 126,
1/7 = 1 × 18/7 × 18 = 18/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
45/18 = 45 × 7/18 × 7 = 315/126 - Subtract the two like fractions:
18/126 - 315/126 = 18 - 315/126 = -297/126 - After reducing the fraction, the answer is -33/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/7-45/18 1/7-90/18 1/14-45/18 1/7-45/36 3/7-45/18 1/21-45/18 1/7-45/54 5/7-45/18 1/35-45/18 1/7-45/90 1/49-45/18