Subtract 30/7 from 81/2
1st number: 40 1/2, 2nd number: 4 2/7
81/2 - 30/7 is 507/14.
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,
30/7 = 30 × 2/7 × 2 = 60/14 - Subtract the two like fractions:
567/14 - 60/14 = 567 - 60/14 = 507/14 - In mixed form: 363/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/2-60/7 81/4-30/7 81/2-30/14 81/2-90/7 81/6-30/7 81/2-30/21 81/10-30/7 81/2-30/35 81/14-30/7 81/2-30/49