Subtract 54/45 from 8/18
1st number: 8/18, 2nd number: 1 9/45
8/18 - 54/45 is -34/45.
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,
8/18 = 8 × 5/18 × 5 = 40/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
54/45 = 54 × 2/45 × 2 = 108/90 - Subtract the two like fractions:
40/90 - 108/90 = 40 - 108/90 = -68/90 - After reducing the fraction, the answer is -34/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/18-54/45 8/36-54/45 8/18-54/90 24/18-54/45 8/54-54/45 40/18-54/45 8/90-54/45 56/18-54/45