Subtract 5/72 from 30/28
1st number: 1 2/28, 2nd number: 5/72
30/28 - 5/72 is 505/504.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 28 × 18 = 504,
30/28 = 30 × 18/28 × 18 = 540/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
5/72 = 5 × 7/72 × 7 = 35/504 - Subtract the two like fractions:
540/504 - 35/504 = 540 - 35/504 = 505/504 - In mixed form: 11/504
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/28-5/72 30/28-10/72 30/56-5/72 90/28-5/72 30/28-15/72 30/84-5/72 30/28-25/72 30/28-35/72