Subtract 21/4 from 1/72
1st number: 1/72, 2nd number: 5 1/4
1/72 - 21/4 is -377/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 4 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
1/72 = 1 × 1/72 × 1 = 1/72 - Likewise, for the 2nd fraction, since 4 × 18 = 72,
21/4 = 21 × 18/4 × 18 = 378/72 - Subtract the two like fractions:
1/72 - 378/72 = 1 - 378/72 = -377/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/72-21/4 1/72-42/4 1/72-21/8 3/72-21/4 1/72-63/4 1/72-21/12 5/72-21/4 1/72-21/20 7/72-21/4 1/72-21/28