Subtract 18/80 from 10/5
1st number: 2 0/5, 2nd number: 18/80
10/5 - 18/80 is 71/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 5 × 16 = 80,
10/5 = 10 × 16/5 × 16 = 160/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
18/80 = 18 × 1/80 × 1 = 18/80 - Subtract the two like fractions:
160/80 - 18/80 = 160 - 18/80 = 142/80 - After reducing the fraction, the answer is 71/40
- In mixed form: 131/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/5-18/80 10/5-36/80 30/5-18/80 10/5-54/80 10/15-18/80 50/5-18/80 10/5-90/80 10/25-18/80 70/5-18/80 10/35-18/80