Subtract 24/63 from 18/21
18/21 - 24/63 is 10/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
18/21 = 18 × 3/21 × 3 = 54/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
24/63 = 24 × 1/63 × 1 = 24/63 - Subtract the two like fractions:
54/63 - 24/63 = 54 - 24/63 = 30/63 - 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: 36/21-24/63 18/21-48/63 18/42-24/63 54/21-24/63 18/21-72/63 18/63-24/63 90/21-24/63