Subtract 9/21 from 70/75
70/75 - 9/21 is 53/105.
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,
70/75 = 70 × 7/75 × 7 = 490/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
9/21 = 9 × 25/21 × 25 = 225/525 - Subtract the two like fractions:
490/525 - 225/525 = 490 - 225/525 = 265/525 - After reducing the fraction, the answer is 53/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/75-18/21 70/75-9/42 70/75-27/21 70/75-9/63 70/75-45/21 70/75-63/21