Subtract 60/63 from 18/54
18/54 - 60/63 is -13/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 63 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
18/54 = 18 × 7/54 × 7 = 126/378 - Likewise, for the 2nd fraction, since 63 × 6 = 378,
60/63 = 60 × 6/63 × 6 = 360/378 - Subtract the two like fractions:
126/378 - 360/378 = 126 - 360/378 = -234/378 - After reducing the fraction, the answer is -13/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/54-60/63 90/54-60/63