Subtract 18/40 from 1/27
1/27 - 18/40 is -223/540.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 40 is 1080
Next, find the equivalent fraction of both fractional numbers with denominator 1080 - For the 1st fraction, since 27 × 40 = 1080,
1/27 = 1 × 40/27 × 40 = 40/1080 - Likewise, for the 2nd fraction, since 40 × 27 = 1080,
18/40 = 18 × 27/40 × 27 = 486/1080 - Subtract the two like fractions:
40/1080 - 486/1080 = 40 - 486/1080 = -446/1080 - After reducing the fraction, the answer is -223/540
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/27-18/40 1/27-36/40 1/54-18/40 1/27-18/80 3/27-18/40 1/27-54/40 1/81-18/40 5/27-18/40 1/27-90/40 7/27-18/40