Subtract 40/56 from 12/80
12/80 - 40/56 is -79/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 56 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
12/80 = 12 × 7/80 × 7 = 84/560 - Likewise, for the 2nd fraction, since 56 × 10 = 560,
40/56 = 40 × 10/56 × 10 = 400/560 - Subtract the two like fractions:
84/560 - 400/560 = 84 - 400/560 = -316/560 - After reducing the fraction, the answer is -79/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/80-40/56 12/80-80/56 36/80-40/56 60/80-40/56 84/80-40/56