Subtract 75/20 from 80/28
1st number: 2 24/28, 2nd number: 3 15/20
80/28 - 75/20 is -25/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
80/28 = 80 × 5/28 × 5 = 400/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
75/20 = 75 × 7/20 × 7 = 525/140 - Subtract the two like fractions:
400/140 - 525/140 = 400 - 525/140 = -125/140 - After reducing the fraction, the answer is -25/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/56-75/20 80/28-75/40 80/84-75/20 80/28-75/60