Subtract 45/4 from 21/50
1st number: 21/50, 2nd number: 11 1/4
21/50 - 45/4 is -1083/100.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 4 is 100
Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 50 × 2 = 100,
21/50 = 21 × 2/50 × 2 = 42/100 - Likewise, for the 2nd fraction, since 4 × 25 = 100,
45/4 = 45 × 25/4 × 25 = 1125/100 - Subtract the two like fractions:
42/100 - 1125/100 = 42 - 1125/100 = -1083/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/50-45/4 21/50-90/4 21/50-45/8 63/50-45/4 21/50-45/12 21/50-45/20 21/50-45/28