Subtract 45/18 from 80/4
1st number: 20 0/4, 2nd number: 2 9/18
80/4 - 45/18 is 35/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 18 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 4 × 9 = 36,
80/4 = 80 × 9/4 × 9 = 720/36 - Likewise, for the 2nd fraction, since 18 × 2 = 36,
45/18 = 45 × 2/18 × 2 = 90/36 - Subtract the two like fractions:
720/36 - 90/36 = 720 - 90/36 = 630/36 - After reducing the fraction, the answer is 35/2
- In mixed form: 171/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/4-90/18 80/8-45/18 80/4-45/36 80/12-45/18 80/4-45/54 80/20-45/18 80/4-45/90 80/28-45/18