Subtract 14/30 from 18/81
18/81 - 14/30 is -11/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 30 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 81 × 10 = 810,
18/81 = 18 × 10/81 × 10 = 180/810 - Likewise, for the 2nd fraction, since 30 × 27 = 810,
14/30 = 14 × 27/30 × 27 = 378/810 - Subtract the two like fractions:
180/810 - 378/810 = 180 - 378/810 = -198/810 - After reducing the fraction, the answer is -11/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/81-14/30 18/81-28/30 18/81-14/60 54/81-14/30 18/81-42/30 18/81-14/90 90/81-14/30 18/81-70/30 18/81-98/30