Subtract 49/81 from 5/30
5/30 - 49/81 is -71/162.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 81 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 30 × 27 = 810,
5/30 = 5 × 27/30 × 27 = 135/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
49/81 = 49 × 10/81 × 10 = 490/810 - Subtract the two like fractions:
135/810 - 490/810 = 135 - 490/810 = -355/810 - After reducing the fraction, the answer is -71/162
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/30-49/81 5/30-98/81 5/60-49/81 15/30-49/81 5/90-49/81 25/30-49/81 35/30-49/81