Subtract 45/18 from 1/20
1st number: 1/20, 2nd number: 2 9/18
1/20 - 45/18 is -49/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 18 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
1/20 = 1 × 9/20 × 9 = 9/180 - Likewise, for the 2nd fraction, since 18 × 10 = 180,
45/18 = 45 × 10/18 × 10 = 450/180 - Subtract the two like fractions:
9/180 - 450/180 = 9 - 450/180 = -441/180 - After reducing the fraction, the answer is -49/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/20-45/18 1/20-90/18 1/40-45/18 1/20-45/36 3/20-45/18 1/60-45/18 1/20-45/54 5/20-45/18 1/20-45/90 7/20-45/18