Subtract 21/20 from 40/27
1st number: 1 13/27, 2nd number: 1 1/20
40/27 - 21/20 is 233/540.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 20 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 27 × 20 = 540,
40/27 = 40 × 20/27 × 20 = 800/540 - Likewise, for the 2nd fraction, since 20 × 27 = 540,
21/20 = 21 × 27/20 × 27 = 567/540 - Subtract the two like fractions:
800/540 - 567/540 = 800 - 567/540 = 233/540
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/27-21/20 40/27-42/20 40/54-21/20 40/27-21/40 40/27-63/20 40/81-21/20 40/27-21/60