Subtract 9/40 from 12/27
12/27 - 9/40 is 79/360.
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,
12/27 = 12 × 40/27 × 40 = 480/1080 - Likewise, for the 2nd fraction, since 40 × 27 = 1080,
9/40 = 9 × 27/40 × 27 = 243/1080 - Subtract the two like fractions:
480/1080 - 243/1080 = 480 - 243/1080 = 237/1080 - After reducing the fraction, the answer is 79/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/27-9/40 12/27-18/40 12/54-9/40 12/27-9/80 36/27-9/40 12/27-27/40 12/81-9/40 60/27-9/40 12/27-45/40 84/27-9/40 12/27-63/40