Subtract 21/54 from 10/63
10/63 - 21/54 is -29/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 63 × 6 = 378,
10/63 = 10 × 6/63 × 6 = 60/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
21/54 = 21 × 7/54 × 7 = 147/378 - Subtract the two like fractions:
60/378 - 147/378 = 60 - 147/378 = -87/378 - After reducing the fraction, the answer is -29/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/63-21/54 10/63-42/54 30/63-21/54 10/63-63/54 50/63-21/54 70/63-21/54