Subtract 1/50 from 18/21
18/21 - 1/50 is 293/350.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 50 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 21 × 50 = 1050,
18/21 = 18 × 50/21 × 50 = 900/1050 - Likewise, for the 2nd fraction, since 50 × 21 = 1050,
1/50 = 1 × 21/50 × 21 = 21/1050 - Subtract the two like fractions:
900/1050 - 21/1050 = 900 - 21/1050 = 879/1050 - After reducing the fraction, the answer is 293/350
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/21-1/50 18/21-2/50 18/42-1/50 54/21-1/50 18/21-3/50 18/63-1/50 90/21-1/50 18/21-5/50 18/21-7/50