Subtract 25/21 from 18/6
1st number: 3 0/6, 2nd number: 1 4/21
18/6 - 25/21 is 38/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
18/6 = 18 × 7/6 × 7 = 126/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
25/21 = 25 × 2/21 × 2 = 50/42 - Subtract the two like fractions:
126/42 - 50/42 = 126 - 50/42 = 76/42 - After reducing the fraction, the answer is 38/21
- In mixed form: 117/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/6-25/21 18/6-50/21 18/12-25/21 18/6-25/42 54/6-25/21 18/6-75/21 18/6-25/63 90/6-25/21 18/30-25/21 18/42-25/21