Subtract 45/20 from 20/54
1st number: 20/54, 2nd number: 2 5/20
20/54 - 45/20 is -203/108.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 20 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 54 × 10 = 540,
20/54 = 20 × 10/54 × 10 = 200/540 - Likewise, for the 2nd fraction, since 20 × 27 = 540,
45/20 = 45 × 27/20 × 27 = 1215/540 - Subtract the two like fractions:
200/540 - 1215/540 = 200 - 1215/540 = -1015/540 - After reducing the fraction, the answer is -203/108
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/54-45/20 20/54-90/20 20/54-45/40 60/54-45/20 20/54-45/60