Subtract 10/42 from 45/12
1st number: 3 9/12, 2nd number: 10/42
45/12 - 10/42 is 295/84.
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,
45/12 = 45 × 7/12 × 7 = 315/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
10/42 = 10 × 2/42 × 2 = 20/84 - Subtract the two like fractions:
315/84 - 20/84 = 315 - 20/84 = 295/84 - In mixed form: 343/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12-10/42 45/12-20/42 45/24-10/42 45/12-10/84 45/12-30/42 45/36-10/42 45/12-50/42 45/60-10/42 45/12-70/42 45/84-10/42