Subtract 9/80 from 3/28
3/28 - 9/80 is -3/560.
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,
3/28 = 3 × 20/28 × 20 = 60/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
9/80 = 9 × 7/80 × 7 = 63/560 - Subtract the two like fractions:
60/560 - 63/560 = 60 - 63/560 = -3/560
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/28-9/80 3/28-18/80 3/56-9/80 9/28-9/80 3/28-27/80 3/84-9/80 15/28-9/80 3/28-45/80 21/28-9/80 3/28-63/80