Subtract 20/27 from 27/40
27/40 - 20/27 is -71/1080.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 27 is 1080
Next, find the equivalent fraction of both fractional numbers with denominator 1080 - For the 1st fraction, since 40 × 27 = 1080,
27/40 = 27 × 27/40 × 27 = 729/1080 - Likewise, for the 2nd fraction, since 27 × 40 = 1080,
20/27 = 20 × 40/27 × 40 = 800/1080 - Subtract the two like fractions:
729/1080 - 800/1080 = 729 - 800/1080 = -71/1080
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/40-20/27 27/40-40/27 27/80-20/27 27/40-20/54 81/40-20/27 27/40-60/27 27/40-20/81