Subtract 24/6 from 18/21
1st number: 18/21, 2nd number: 4 0/6
18/21 - 24/6 is -22/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
18/21 = 18 × 2/21 × 2 = 36/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
24/6 = 24 × 7/6 × 7 = 168/42 - Subtract the two like fractions:
36/42 - 168/42 = 36 - 168/42 = -132/42 - After reducing the fraction, the answer is -22/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/21-24/6 18/21-48/6 18/42-24/6 18/21-24/12 54/21-24/6 18/21-72/6 18/63-24/6 18/21-24/18 90/21-24/6 18/21-24/30 18/21-24/42