Subtract 54/35 from 81/28
1st number: 2 25/28, 2nd number: 1 19/35
81/28 - 54/35 is 27/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 35 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
81/28 = 81 × 5/28 × 5 = 405/140 - Likewise, for the 2nd fraction, since 35 × 4 = 140,
54/35 = 54 × 4/35 × 4 = 216/140 - Subtract the two like fractions:
405/140 - 216/140 = 405 - 216/140 = 189/140 - After reducing the fraction, the answer is 27/20
- In mixed form: 17/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/56-54/35 81/28-54/70 81/84-54/35