Subtract 42/75 from 21/6
1st number: 3 3/6, 2nd number: 42/75
21/6 - 42/75 is 147/50.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 75 is 150
Next, find the equivalent fraction of both fractional numbers with denominator 150 - For the 1st fraction, since 6 × 25 = 150,
21/6 = 21 × 25/6 × 25 = 525/150 - Likewise, for the 2nd fraction, since 75 × 2 = 150,
42/75 = 42 × 2/75 × 2 = 84/150 - Subtract the two like fractions:
525/150 - 84/150 = 525 - 84/150 = 441/150 - After reducing the fraction, the answer is 147/50
- In mixed form: 247/50
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/6-42/75 21/6-84/75 21/12-42/75 63/6-42/75 21/18-42/75 21/30-42/75 21/42-42/75