Subtract 27/54 from 21/20
1st number: 1 1/20, 2nd number: 27/54
21/20 - 27/54 is 11/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 54 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 20 × 27 = 540,
21/20 = 21 × 27/20 × 27 = 567/540 - Likewise, for the 2nd fraction, since 54 × 10 = 540,
27/54 = 27 × 10/54 × 10 = 270/540 - Subtract the two like fractions:
567/540 - 270/540 = 567 - 270/540 = 297/540 - After reducing the fraction, the answer is 11/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/20-27/54 21/40-27/54 63/20-27/54 21/20-81/54 21/60-27/54