Subtract 4/80 from 5/28
5/28 - 4/80 is 9/70.
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,
5/28 = 5 × 20/28 × 20 = 100/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
4/80 = 4 × 7/80 × 7 = 28/560 - Subtract the two like fractions:
100/560 - 28/560 = 100 - 28/560 = 72/560 - After reducing the fraction, the answer is 9/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/28-4/80 5/28-8/80 5/56-4/80 15/28-4/80 5/28-12/80 5/84-4/80 25/28-4/80 5/28-20/80 35/28-4/80 5/28-28/80