Subtract 21/5 from 80/8
1st number: 10 0/8, 2nd number: 4 1/5
80/8 - 21/5 is 29/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 5 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
80/8 = 80 × 5/8 × 5 = 400/40 - Likewise, for the 2nd fraction, since 5 × 8 = 40,
21/5 = 21 × 8/5 × 8 = 168/40 - Subtract the two like fractions:
400/40 - 168/40 = 400 - 168/40 = 232/40 - After reducing the fraction, the answer is 29/5
- In mixed form: 54/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/8-42/5 80/16-21/5 80/8-21/10 80/8-63/5 80/24-21/5 80/8-21/15 80/40-21/5 80/8-21/25 80/56-21/5 80/8-21/35