Subtract 27/8 from 30/72
1st number: 30/72, 2nd number: 3 3/8
30/72 - 27/8 is -71/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
30/72 = 30 × 1/72 × 1 = 30/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
27/8 = 27 × 9/8 × 9 = 243/72 - Subtract the two like fractions:
30/72 - 243/72 = 30 - 243/72 = -213/72 - After reducing the fraction, the answer is -71/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/72-27/8 30/72-54/8 30/72-27/16 90/72-27/8 30/72-81/8 30/72-27/24 30/72-27/40 30/72-27/56