Subtract 28/5 from 12/80
1st number: 12/80, 2nd number: 5 3/5
12/80 - 28/5 is -109/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 5 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
12/80 = 12 × 1/80 × 1 = 12/80 - Likewise, for the 2nd fraction, since 5 × 16 = 80,
28/5 = 28 × 16/5 × 16 = 448/80 - Subtract the two like fractions:
12/80 - 448/80 = 12 - 448/80 = -436/80 - After reducing the fraction, the answer is -109/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/80-28/5 12/80-56/5 12/80-28/10 36/80-28/5 12/80-84/5 12/80-28/15 60/80-28/5 12/80-28/25 84/80-28/5 12/80-28/35