Subtract 10/5 from 30/81
1st number: 30/81, 2nd number: 2 0/5
30/81 - 10/5 is -44/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 5 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 81 × 5 = 405,
30/81 = 30 × 5/81 × 5 = 150/405 - Likewise, for the 2nd fraction, since 5 × 81 = 405,
10/5 = 10 × 81/5 × 81 = 810/405 - Subtract the two like fractions:
150/405 - 810/405 = 150 - 810/405 = -660/405 - After reducing the fraction, the answer is -44/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/81-10/5 30/81-20/5 90/81-10/5 30/81-30/5 30/81-10/15 30/81-50/5 30/81-10/25 30/81-70/5 30/81-10/35