Subtract 18/21 from 5/50
5/50 - 18/21 is -53/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 21 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 50 × 21 = 1050,
5/50 = 5 × 21/50 × 21 = 105/1050 - Likewise, for the 2nd fraction, since 21 × 50 = 1050,
18/21 = 18 × 50/21 × 50 = 900/1050 - Subtract the two like fractions:
105/1050 - 900/1050 = 105 - 900/1050 = -795/1050 - After reducing the fraction, the answer is -53/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/50-18/21 5/50-36/21 5/50-18/42 15/50-18/21 5/50-54/21 5/50-18/63 25/50-18/21 5/50-90/21 35/50-18/21