Subtract 20/45 from 54/18
1st number: 3 0/18, 2nd number: 20/45
54/18 - 20/45 is 23/9.
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,
54/18 = 54 × 5/18 × 5 = 270/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
20/45 = 20 × 2/45 × 2 = 40/90 - Subtract the two like fractions:
270/90 - 40/90 = 270 - 40/90 = 230/90 - After reducing the fraction, the answer is 23/9
- In mixed form: 25/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/18-40/45 54/36-20/45 54/18-20/90 54/18-60/45 54/90-20/45