Subtract 54/18 from 4/5
1st number: 4/5, 2nd number: 3 0/18
4/5 - 54/18 is -11/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
4/5 = 4 × 18/5 × 18 = 72/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
54/18 = 54 × 5/18 × 5 = 270/90 - Subtract the two like fractions:
72/90 - 270/90 = 72 - 270/90 = -198/90 - After reducing the fraction, the answer is -11/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/5-54/18 4/10-54/18 4/5-54/36 12/5-54/18 4/15-54/18 20/5-54/18 4/25-54/18 4/5-54/90 28/5-54/18 4/35-54/18