Subtract 6/5 from 21/80
1st number: 21/80, 2nd number: 1 1/5
21/80 - 6/5 is -15/16.
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,
21/80 = 21 × 1/80 × 1 = 21/80 - Likewise, for the 2nd fraction, since 5 × 16 = 80,
6/5 = 6 × 16/5 × 16 = 96/80 - Subtract the two like fractions:
21/80 - 96/80 = 21 - 96/80 = -75/80 - After reducing the fraction, the answer is -15/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/80-6/5 21/80-12/5 21/80-6/10 63/80-6/5 21/80-18/5 21/80-6/15 21/80-30/5 21/80-6/25 21/80-42/5 21/80-6/35