Subtract 24/4 from 45/21
1st number: 2 3/21, 2nd number: 6 0/4
45/21 - 24/4 is -27/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
45/21 = 45 × 4/21 × 4 = 180/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
24/4 = 24 × 21/4 × 21 = 504/84 - Subtract the two like fractions:
180/84 - 504/84 = 180 - 504/84 = -324/84 - After reducing the fraction, the answer is -27/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/21-24/4 45/21-48/4 45/42-24/4 45/21-24/8 45/21-72/4 45/63-24/4 45/21-24/12 45/21-24/20 45/21-24/28