Subtract 54/21 from 6/24
1st number: 6/24, 2nd number: 2 12/21
6/24 - 54/21 is -65/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
6/24 = 6 × 7/24 × 7 = 42/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
54/21 = 54 × 8/21 × 8 = 432/168 - Subtract the two like fractions:
42/168 - 432/168 = 42 - 432/168 = -390/168 - After reducing the fraction, the answer is -65/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/24-54/21 6/48-54/21 6/24-54/42 18/24-54/21 6/72-54/21 6/24-54/63 30/24-54/21 42/24-54/21