Subtract 20/28 from 84/9
1st number: 9 3/9, 2nd number: 20/28
84/9 - 20/28 is 181/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 28 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 9 × 28 = 252,
84/9 = 84 × 28/9 × 28 = 2352/252 - Likewise, for the 2nd fraction, since 28 × 9 = 252,
20/28 = 20 × 9/28 × 9 = 180/252 - Subtract the two like fractions:
2352/252 - 180/252 = 2352 - 180/252 = 2172/252 - After reducing the fraction, the answer is 181/21
- In mixed form: 813/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/9-40/28 84/18-20/28 84/9-20/56 84/9-60/28 84/27-20/28 84/9-20/84 84/45-20/28 84/63-20/28