Subtract 4/18 from 3/45
3/45 - 4/18 is -7/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
3/45 = 3 × 2/45 × 2 = 6/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
4/18 = 4 × 5/18 × 5 = 20/90 - Subtract the two like fractions:
6/90 - 20/90 = 6 - 20/90 = -14/90 - After reducing the fraction, the answer is -7/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/45-4/18 3/45-8/18 3/90-4/18 3/45-4/36 9/45-4/18 3/45-12/18 3/45-4/54 15/45-4/18 3/45-20/18 3/45-4/90 21/45-4/18 3/45-28/18