Subtract 18/21 from 10/50
10/50 - 18/21 is -23/35.
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,
10/50 = 10 × 21/50 × 21 = 210/1050 - Likewise, for the 2nd fraction, since 21 × 50 = 1050,
18/21 = 18 × 50/21 × 50 = 900/1050 - Subtract the two like fractions:
210/1050 - 900/1050 = 210 - 900/1050 = -690/1050 - After reducing the fraction, the answer is -23/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/50-18/21 10/50-36/21 10/50-18/42 30/50-18/21 10/50-54/21 10/50-18/63 10/50-90/21 70/50-18/21