Subtract 81/21 from 24/4
1st number: 6 0/4, 2nd number: 3 18/21
24/4 - 81/21 is 15/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
24/4 = 24 × 21/4 × 21 = 504/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
81/21 = 81 × 4/21 × 4 = 324/84 - Subtract the two like fractions:
504/84 - 324/84 = 504 - 324/84 = 180/84 - After reducing the fraction, the answer is 15/7
- In mixed form: 21/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/4-81/21 24/8-81/21 24/4-81/42 72/4-81/21 24/12-81/21 24/4-81/63 24/20-81/21 24/28-81/21