Subtract 18/30 from 80/18
1st number: 4 8/18, 2nd number: 18/30
80/18 - 18/30 is 173/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
80/18 = 80 × 5/18 × 5 = 400/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
18/30 = 18 × 3/30 × 3 = 54/90 - Subtract the two like fractions:
400/90 - 54/90 = 400 - 54/90 = 346/90 - After reducing the fraction, the answer is 173/45
- In mixed form: 338/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/18-36/30 80/36-18/30 80/18-18/60 80/18-54/30 80/54-18/30 80/18-18/90 80/18-90/30 80/90-18/30