Subtract 90/27 from 27/72
1st number: 27/72, 2nd number: 3 9/27
27/72 - 90/27 is -71/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 27 is 216
Next, find the equivalent fraction of both fractional numbers with denominator 216 - For the 1st fraction, since 72 × 3 = 216,
27/72 = 27 × 3/72 × 3 = 81/216 - Likewise, for the 2nd fraction, since 27 × 8 = 216,
90/27 = 90 × 8/27 × 8 = 720/216 - Subtract the two like fractions:
81/216 - 720/216 = 81 - 720/216 = -639/216 - 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: 54/72-90/27 27/72-90/54 81/72-90/27 27/72-90/81