Subtract 15/42 from 28/12
1st number: 2 4/12, 2nd number: 15/42
28/12 - 15/42 is 83/42.
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,
28/12 = 28 × 7/12 × 7 = 196/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
15/42 = 15 × 2/42 × 2 = 30/84 - Subtract the two like fractions:
196/84 - 30/84 = 196 - 30/84 = 166/84 - After reducing the fraction, the answer is 83/42
- In mixed form: 141/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/12-15/42 28/12-30/42 28/24-15/42 28/12-15/84 84/12-15/42 28/12-45/42 28/36-15/42 28/12-75/42 28/60-15/42 28/84-15/42