Subtract 3/9 from 81/28
1st number: 2 25/28, 2nd number: 3/9
81/28 - 3/9 is 215/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 9 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 28 × 9 = 252,
81/28 = 81 × 9/28 × 9 = 729/252 - Likewise, for the 2nd fraction, since 9 × 28 = 252,
3/9 = 3 × 28/9 × 28 = 84/252 - Subtract the two like fractions:
729/252 - 84/252 = 729 - 84/252 = 645/252 - After reducing the fraction, the answer is 215/84
- In mixed form: 247/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/28-6/9 81/56-3/9 81/28-3/18 81/84-3/9 81/28-3/27 81/28-15/9 81/28-3/45 81/28-21/9 81/28-3/63