Subtract 81/28 from 15/2
1st number: 7 1/2, 2nd number: 2 25/28
15/2 - 81/28 is 129/28.
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,
15/2 = 15 × 14/2 × 14 = 210/28 - Likewise, for the 2nd fraction, since 28 × 1 = 28,
81/28 = 81 × 1/28 × 1 = 81/28 - Subtract the two like fractions:
210/28 - 81/28 = 210 - 81/28 = 129/28 - In mixed form: 417/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/2-81/28 15/4-81/28 15/2-81/56 45/2-81/28 15/6-81/28 15/2-81/84 75/2-81/28 15/10-81/28 15/14-81/28