Subtract 45/10 from 21/25
1st number: 21/25, 2nd number: 4 5/10
21/25 - 45/10 is -183/50.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 10 is 50
Next, find the equivalent fraction of both fractional numbers with denominator 50 - For the 1st fraction, since 25 × 2 = 50,
21/25 = 21 × 2/25 × 2 = 42/50 - Likewise, for the 2nd fraction, since 10 × 5 = 50,
45/10 = 45 × 5/10 × 5 = 225/50 - Subtract the two like fractions:
42/50 - 225/50 = 42 - 225/50 = -183/50
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/25-45/10 21/25-90/10 21/50-45/10 21/25-45/20 63/25-45/10 21/75-45/10 21/25-45/30 21/25-45/50 21/25-45/70