Subtract 25/28 from 81/2
1st number: 40 1/2, 2nd number: 25/28
81/2 - 25/28 is 1109/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 28 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 2 × 14 = 28,
81/2 = 81 × 14/2 × 14 = 1134/28 - Likewise, for the 2nd fraction, since 28 × 1 = 28,
25/28 = 25 × 1/28 × 1 = 25/28 - Subtract the two like fractions:
1134/28 - 25/28 = 1134 - 25/28 = 1109/28 - In mixed form: 3917/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/2-50/28 81/4-25/28 81/2-25/56 81/2-75/28 81/6-25/28 81/2-25/84 81/10-25/28 81/14-25/28