Subtract 18/84 from 27/72
27/72 - 18/84 is 9/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 84 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
27/72 = 27 × 7/72 × 7 = 189/504 - Likewise, for the 2nd fraction, since 84 × 6 = 504,
18/84 = 18 × 6/84 × 6 = 108/504 - Subtract the two like fractions:
189/504 - 108/504 = 189 - 108/504 = 81/504 - After reducing the fraction, the answer is 9/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/72-18/84 27/72-36/84 81/72-18/84 27/72-54/84 27/72-90/84