Subtract 28/80 from 20/25
20/25 - 28/80 is 9/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 80 is 400
Next, find the equivalent fraction of both fractional numbers with denominator 400 - For the 1st fraction, since 25 × 16 = 400,
20/25 = 20 × 16/25 × 16 = 320/400 - Likewise, for the 2nd fraction, since 80 × 5 = 400,
28/80 = 28 × 5/80 × 5 = 140/400 - Subtract the two like fractions:
320/400 - 140/400 = 320 - 140/400 = 180/400 - After reducing the fraction, the answer is 9/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/25-28/80 20/25-56/80 20/50-28/80 60/25-28/80 20/25-84/80 20/75-28/80