Subtract 10/20 from 80/5
1st number: 16 0/5, 2nd number: 10/20
80/5 - 10/20 is 31/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 5 × 4 = 20,
80/5 = 80 × 4/5 × 4 = 320/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
10/20 = 10 × 1/20 × 1 = 10/20 - Subtract the two like fractions:
320/20 - 10/20 = 320 - 10/20 = 310/20 - After reducing the fraction, the answer is 31/2
- In mixed form: 151/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/10-10/20 80/5-10/40 80/5-30/20 80/15-10/20 80/5-10/60 80/5-50/20 80/25-10/20 80/5-70/20 80/35-10/20