Subtract 24/81 from 1/7
1/7 - 24/81 is -29/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 7 × 81 = 567,
1/7 = 1 × 81/7 × 81 = 81/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
24/81 = 24 × 7/81 × 7 = 168/567 - Subtract the two like fractions:
81/567 - 168/567 = 81 - 168/567 = -87/567 - After reducing the fraction, the answer is -29/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/7-24/81 1/7-48/81 1/14-24/81 3/7-24/81 1/7-72/81 1/21-24/81 5/7-24/81 1/35-24/81 1/49-24/81