Subtract 9/21 from 63/75
63/75 - 9/21 is 72/175.
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,
63/75 = 63 × 7/75 × 7 = 441/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
9/21 = 9 × 25/21 × 25 = 225/525 - Subtract the two like fractions:
441/525 - 225/525 = 441 - 225/525 = 216/525 - After reducing the fraction, the answer is 72/175
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/75-18/21 63/75-9/42 63/75-27/21 63/75-9/63 63/75-45/21 63/75-63/21