Subtract 18/80 from 18/8
1st number: 2 2/8, 2nd number: 18/80
18/8 - 18/80 is 81/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 8 × 10 = 80,
18/8 = 18 × 10/8 × 10 = 180/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
18/80 = 18 × 1/80 × 1 = 18/80 - Subtract the two like fractions:
180/80 - 18/80 = 180 - 18/80 = 162/80 - After reducing the fraction, the answer is 81/40
- In mixed form: 21/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/8-18/80 18/8-36/80 18/16-18/80 54/8-18/80 18/8-54/80 18/24-18/80 90/8-18/80 18/8-90/80 18/40-18/80 18/56-18/80