Subtract 4/42 from 84/12
1st number: 7 0/12, 2nd number: 4/42
84/12 - 4/42 is 145/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
84/12 = 84 × 7/12 × 7 = 588/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
4/42 = 4 × 2/42 × 2 = 8/84 - Subtract the two like fractions:
588/84 - 8/84 = 588 - 8/84 = 580/84 - After reducing the fraction, the answer is 145/21
- In mixed form: 619/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/12-8/42 84/24-4/42 84/12-4/84 84/12-12/42 84/36-4/42 84/12-20/42 84/60-4/42 84/12-28/42