Subtract 21/63 from 15/50
15/50 - 21/63 is -1/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 63 is 3150
Next, find the equivalent fraction of both fractional numbers with denominator 3150 - For the 1st fraction, since 50 × 63 = 3150,
15/50 = 15 × 63/50 × 63 = 945/3150 - Likewise, for the 2nd fraction, since 63 × 50 = 3150,
21/63 = 21 × 50/63 × 50 = 1050/3150 - Subtract the two like fractions:
945/3150 - 1050/3150 = 945 - 1050/3150 = -105/3150 - After reducing the fraction, the answer is -1/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/50-21/63 15/50-42/63 45/50-21/63 75/50-21/63