Subtract 25/45 from 1/18
1/18 - 25/45 is -1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
1/18 = 1 × 5/18 × 5 = 5/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
25/45 = 25 × 2/45 × 2 = 50/90 - Subtract the two like fractions:
5/90 - 50/90 = 5 - 50/90 = -45/90 - After reducing the fraction, the answer is -1/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/18-25/45 1/18-50/45 1/36-25/45 1/18-25/90 3/18-25/45 1/18-75/45 1/54-25/45 5/18-25/45 1/90-25/45 7/18-25/45