Subtract 5/42 from 25/21
1st number: 1 4/21, 2nd number: 5/42
25/21 - 5/42 is 15/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
25/21 = 25 × 2/21 × 2 = 50/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
5/42 = 5 × 1/42 × 1 = 5/42 - Subtract the two like fractions:
50/42 - 5/42 = 50 - 5/42 = 45/42 - After reducing the fraction, the answer is 15/14
- In mixed form: 11/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/21-5/42 25/21-10/42 25/42-5/42 25/21-5/84 75/21-5/42 25/21-15/42 25/63-5/42 25/21-25/42 25/21-35/42