Subtract 40/12 from 4/84
1st number: 4/84, 2nd number: 3 4/12
4/84 - 40/12 is -23/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
4/84 = 4 × 1/84 × 1 = 4/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
40/12 = 40 × 7/12 × 7 = 280/84 - Subtract the two like fractions:
4/84 - 280/84 = 4 - 280/84 = -276/84 - After reducing the fraction, the answer is -23/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/84-40/12 4/84-80/12 4/84-40/24 12/84-40/12 4/84-40/36 20/84-40/12 4/84-40/60 28/84-40/12 4/84-40/84