Subtract 3/75 from 30/21
1st number: 1 9/21, 2nd number: 3/75
30/21 - 3/75 is 243/175.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 75 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 21 × 25 = 525,
30/21 = 30 × 25/21 × 25 = 750/525 - Likewise, for the 2nd fraction, since 75 × 7 = 525,
3/75 = 3 × 7/75 × 7 = 21/525 - Subtract the two like fractions:
750/525 - 21/525 = 750 - 21/525 = 729/525 - After reducing the fraction, the answer is 243/175
- In mixed form: 168/175
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/21-3/75 30/21-6/75 30/42-3/75 90/21-3/75 30/21-9/75 30/63-3/75 30/21-15/75 30/21-21/75