Subtract 49/81 from 30/42
30/42 - 49/81 is 62/567.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 81 is 1134
Next, find the equivalent fraction of both fractional numbers with denominator 1134 - For the 1st fraction, since 42 × 27 = 1134,
30/42 = 30 × 27/42 × 27 = 810/1134 - Likewise, for the 2nd fraction, since 81 × 14 = 1134,
49/81 = 49 × 14/81 × 14 = 686/1134 - Subtract the two like fractions:
810/1134 - 686/1134 = 810 - 686/1134 = 124/1134 - After reducing the fraction, the answer is 62/567
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/42-49/81 30/42-98/81 30/84-49/81 90/42-49/81