Subtract 16/21 from 30/75
30/75 - 16/21 is -38/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 21 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 75 × 7 = 525,
30/75 = 30 × 7/75 × 7 = 210/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
16/21 = 16 × 25/21 × 25 = 400/525 - Subtract the two like fractions:
210/525 - 400/525 = 210 - 400/525 = -190/525 - After reducing the fraction, the answer is -38/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/75-16/21 30/75-32/21 30/75-16/42 90/75-16/21 30/75-48/21 30/75-16/63 30/75-80/21