Subtract 20/7 from 84/9
1st number: 9 3/9, 2nd number: 2 6/7
84/9 - 20/7 is 136/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 7 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 7 × 9 = 63,
20/7 = 20 × 9/7 × 9 = 180/63 - Subtract the two like fractions:
588/63 - 180/63 = 588 - 180/63 = 408/63 - After reducing the fraction, the answer is 136/21
- In mixed form: 610/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/9-40/7 84/18-20/7 84/9-20/14 84/9-60/7 84/27-20/7 84/9-20/21 84/45-20/7 84/9-20/35 84/63-20/7 84/9-20/49