Subtract 49/81 from 4/30
4/30 - 49/81 is -191/405.
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,
4/30 = 4 × 27/30 × 27 = 108/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
49/81 = 49 × 10/81 × 10 = 490/810 - Subtract the two like fractions:
108/810 - 490/810 = 108 - 490/810 = -382/810 - After reducing the fraction, the answer is -191/405
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/30-49/81 4/30-98/81 4/60-49/81 12/30-49/81 4/90-49/81 20/30-49/81 28/30-49/81