Subtract 56/45 from 3/81
1st number: 3/81, 2nd number: 1 11/45
3/81 - 56/45 is -163/135.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 45 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 81 × 5 = 405,
3/81 = 3 × 5/81 × 5 = 15/405 - Likewise, for the 2nd fraction, since 45 × 9 = 405,
56/45 = 56 × 9/45 × 9 = 504/405 - Subtract the two like fractions:
15/405 - 504/405 = 15 - 504/405 = -489/405 - After reducing the fraction, the answer is -163/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/81-56/45 3/81-56/90 9/81-56/45 15/81-56/45 21/81-56/45