Subtract 10/5 from 18/80
1st number: 18/80, 2nd number: 2 0/5
18/80 - 10/5 is -71/40.
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,
18/80 = 18 × 1/80 × 1 = 18/80 - Likewise, for the 2nd fraction, since 5 × 16 = 80,
10/5 = 10 × 16/5 × 16 = 160/80 - Subtract the two like fractions:
18/80 - 160/80 = 18 - 160/80 = -142/80 - After reducing the fraction, the answer is -71/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/80-10/5 18/80-20/5 54/80-10/5 18/80-30/5 18/80-10/15 90/80-10/5 18/80-50/5 18/80-10/25 18/80-70/5 18/80-10/35