Subtract 27/80 from 1/28
1/28 - 27/80 is -169/560.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 28 × 20 = 560,
1/28 = 1 × 20/28 × 20 = 20/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
27/80 = 27 × 7/80 × 7 = 189/560 - Subtract the two like fractions:
20/560 - 189/560 = 20 - 189/560 = -169/560
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/28-27/80 1/28-54/80 1/56-27/80 3/28-27/80 1/28-81/80 1/84-27/80 5/28-27/80 7/28-27/80