Subtract 7/84 from 81/28
1st number: 2 25/28, 2nd number: 7/84
81/28 - 7/84 is 59/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
81/28 = 81 × 3/28 × 3 = 243/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
7/84 = 7 × 1/84 × 1 = 7/84 - Subtract the two like fractions:
243/84 - 7/84 = 243 - 7/84 = 236/84 - After reducing the fraction, the answer is 59/21
- In mixed form: 217/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/28-14/84 81/56-7/84 81/28-21/84 81/84-7/84 81/28-35/84 81/28-49/84