Subtract 21/4 from 5/30
1st number: 5/30, 2nd number: 5 1/4
5/30 - 21/4 is -61/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 4 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
5/30 = 5 × 2/30 × 2 = 10/60 - Likewise, for the 2nd fraction, since 4 × 15 = 60,
21/4 = 21 × 15/4 × 15 = 315/60 - Subtract the two like fractions:
10/60 - 315/60 = 10 - 315/60 = -305/60 - After reducing the fraction, the answer is -61/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/30-21/4 5/30-42/4 5/60-21/4 5/30-21/8 15/30-21/4 5/30-63/4 5/90-21/4 5/30-21/12 25/30-21/4 5/30-21/20 35/30-21/4 5/30-21/28