Subtract 80/50 from 7/18
1st number: 7/18, 2nd number: 1 30/50
7/18 - 80/50 is -109/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 50 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 18 × 25 = 450,
7/18 = 7 × 25/18 × 25 = 175/450 - Likewise, for the 2nd fraction, since 50 × 9 = 450,
80/50 = 80 × 9/50 × 9 = 720/450 - Subtract the two like fractions:
175/450 - 720/450 = 175 - 720/450 = -545/450 - After reducing the fraction, the answer is -109/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/18-80/50 7/36-80/50 21/18-80/50 7/54-80/50 35/18-80/50 7/90-80/50 49/18-80/50