Subtract 5/42 from 30/12
1st number: 2 6/12, 2nd number: 5/42
30/12 - 5/42 is 50/21.
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,
30/12 = 30 × 7/12 × 7 = 210/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
5/42 = 5 × 2/42 × 2 = 10/84 - Subtract the two like fractions:
210/84 - 10/84 = 210 - 10/84 = 200/84 - After reducing the fraction, the answer is 50/21
- In mixed form: 28/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/12-5/42 30/12-10/42 30/24-5/42 30/12-5/84 90/12-5/42 30/12-15/42 30/36-5/42 30/12-25/42 30/60-5/42 30/12-35/42 30/84-5/42