Subtract 54/84 from 3/18
3/18 - 54/84 is -10/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 84 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 18 × 14 = 252,
3/18 = 3 × 14/18 × 14 = 42/252 - Likewise, for the 2nd fraction, since 84 × 3 = 252,
54/84 = 54 × 3/84 × 3 = 162/252 - Subtract the two like fractions:
42/252 - 162/252 = 42 - 162/252 = -120/252 - After reducing the fraction, the answer is -10/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/18-54/84 3/36-54/84 9/18-54/84 3/54-54/84 15/18-54/84 3/90-54/84 21/18-54/84