Subtract 54/60 from 18/28
18/28 - 54/60 is -9/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
18/28 = 18 × 15/28 × 15 = 270/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
54/60 = 54 × 7/60 × 7 = 378/420 - Subtract the two like fractions:
270/420 - 378/420 = 270 - 378/420 = -108/420 - After reducing the fraction, the answer is -9/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/28-54/60 18/56-54/60 54/28-54/60 18/84-54/60 90/28-54/60