Subtract 21/4 from 30/50
1st number: 30/50, 2nd number: 5 1/4
30/50 - 21/4 is -93/20.
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,
30/50 = 30 × 2/50 × 2 = 60/100 - Likewise, for the 2nd fraction, since 4 × 25 = 100,
21/4 = 21 × 25/4 × 25 = 525/100 - Subtract the two like fractions:
60/100 - 525/100 = 60 - 525/100 = -465/100 - After reducing the fraction, the answer is -93/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/50-21/4 30/50-42/4 30/50-21/8 90/50-21/4 30/50-63/4 30/50-21/12 30/50-21/20 30/50-21/28