Subtract 27/40 from 12/7
1st number: 1 5/7, 2nd number: 27/40
12/7 - 27/40 is 291/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 7 × 40 = 280,
12/7 = 12 × 40/7 × 40 = 480/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
27/40 = 27 × 7/40 × 7 = 189/280 - Subtract the two like fractions:
480/280 - 189/280 = 480 - 189/280 = 291/280 - In mixed form: 111/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/7-27/40 12/7-54/40 12/14-27/40 12/7-27/80 36/7-27/40 12/7-81/40 12/21-27/40 60/7-27/40 12/35-27/40 84/7-27/40 12/49-27/40