Subtract 9/27 from 10/40
10/40 - 9/27 is -1/12.
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,
10/40 = 10 × 27/40 × 27 = 270/1080 - Likewise, for the 2nd fraction, since 27 × 40 = 1080,
9/27 = 9 × 40/27 × 40 = 360/1080 - Subtract the two like fractions:
270/1080 - 360/1080 = 270 - 360/1080 = -90/1080 - After reducing the fraction, the answer is -1/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/40-9/27 10/40-18/27 10/80-9/27 10/40-9/54 30/40-9/27 10/40-9/81 50/40-9/27 10/40-45/27 70/40-9/27 10/40-63/27