Subtract 2/30 from 2/81
2/81 - 2/30 is -17/405.
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,
2/81 = 2 × 10/81 × 10 = 20/810 - Likewise, for the 2nd fraction, since 30 × 27 = 810,
2/30 = 2 × 27/30 × 27 = 54/810 - Subtract the two like fractions:
20/810 - 54/810 = 20 - 54/810 = -34/810 - After reducing the fraction, the answer is -17/405
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/81-2/30 2/81-4/30 2/81-2/60 6/81-2/30 2/81-6/30 2/81-2/90 10/81-2/30 2/81-10/30 14/81-2/30 2/81-14/30