Subtract 1/7 from 81/2
1st number: 40 1/2, 2nd number: 1/7
81/2 - 1/7 is 565/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 7 is 14
Next, find the equivalent fraction of both fractional numbers with denominator 14 - For the 1st fraction, since 2 × 7 = 14,
81/2 = 81 × 7/2 × 7 = 567/14 - Likewise, for the 2nd fraction, since 7 × 2 = 14,
1/7 = 1 × 2/7 × 2 = 2/14 - Subtract the two like fractions:
567/14 - 2/14 = 567 - 2/14 = 565/14 - In mixed form: 405/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/2-2/7 81/4-1/7 81/2-1/14 81/2-3/7 81/6-1/7 81/2-1/21 81/2-5/7 81/10-1/7 81/2-1/35 81/14-1/7 81/2-1/49