Subtract 21/56 from 1/80
1/80 - 21/56 is -29/80.
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,
1/80 = 1 × 7/80 × 7 = 7/560 - Likewise, for the 2nd fraction, since 56 × 10 = 560,
21/56 = 21 × 10/56 × 10 = 210/560 - Subtract the two like fractions:
7/560 - 210/560 = 7 - 210/560 = -203/560 - After reducing the fraction, the answer is -29/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/80-21/56 1/80-42/56 3/80-21/56 1/80-63/56 5/80-21/56 7/80-21/56