Subtract 81/5 from 30/2
1st number: 15 0/2, 2nd number: 16 1/5
30/2 - 81/5 is -6/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 5 is 10
Next, find the equivalent fraction of both fractional numbers with denominator 10 - For the 1st fraction, since 2 × 5 = 10,
30/2 = 30 × 5/2 × 5 = 150/10 - Likewise, for the 2nd fraction, since 5 × 2 = 10,
81/5 = 81 × 2/5 × 2 = 162/10 - Subtract the two like fractions:
150/10 - 162/10 = 150 - 162/10 = -12/10 - After reducing the fraction, the answer is -6/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/2-81/5 30/4-81/5 30/2-81/10 90/2-81/5 30/6-81/5 30/2-81/15 30/10-81/5 30/2-81/25 30/14-81/5 30/2-81/35