Subtract 21/50 from 12/18
12/18 - 21/50 is 37/150.
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,
12/18 = 12 × 25/18 × 25 = 300/450 - Likewise, for the 2nd fraction, since 50 × 9 = 450,
21/50 = 21 × 9/50 × 9 = 189/450 - Subtract the two like fractions:
300/450 - 189/450 = 300 - 189/450 = 111/450 - After reducing the fraction, the answer is 37/150
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/18-21/50 12/18-42/50 12/36-21/50 36/18-21/50 12/18-63/50 12/54-21/50 60/18-21/50 12/90-21/50 84/18-21/50