Subtract 24/84 from 40/12
1st number: 3 4/12, 2nd number: 24/84
40/12 - 24/84 is 64/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
40/12 = 40 × 7/12 × 7 = 280/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
24/84 = 24 × 1/84 × 1 = 24/84 - Subtract the two like fractions:
280/84 - 24/84 = 280 - 24/84 = 256/84 - After reducing the fraction, the answer is 64/21
- In mixed form: 31/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/12-24/84 40/12-48/84 40/24-24/84 40/12-72/84 40/36-24/84 40/60-24/84 40/84-24/84