Subtract 21/18 from 80/50
1st number: 1 30/50, 2nd number: 1 3/18
80/50 - 21/18 is 13/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 18 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 50 × 9 = 450,
80/50 = 80 × 9/50 × 9 = 720/450 - Likewise, for the 2nd fraction, since 18 × 25 = 450,
21/18 = 21 × 25/18 × 25 = 525/450 - Subtract the two like fractions:
720/450 - 525/450 = 720 - 525/450 = 195/450 - After reducing the fraction, the answer is 13/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/50-42/18 80/50-21/36 80/50-63/18 80/50-21/54 80/50-21/90