Subtract 9/21 from 84/9
1st number: 9 3/9, 2nd number: 9/21
84/9 - 9/21 is 187/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
84/9 = 84 × 7/9 × 7 = 588/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
9/21 = 9 × 3/21 × 3 = 27/63 - Subtract the two like fractions:
588/63 - 27/63 = 588 - 27/63 = 561/63 - After reducing the fraction, the answer is 187/21
- In mixed form: 819/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/9-18/21 84/18-9/21 84/9-9/42 84/9-27/21 84/27-9/21 84/9-9/63 84/9-45/21 84/45-9/21 84/9-63/21 84/63-9/21