Subtract 63/81 from 18/7
1st number: 2 4/7, 2nd number: 63/81
18/7 - 63/81 is 113/63.
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,
18/7 = 18 × 81/7 × 81 = 1458/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
63/81 = 63 × 7/81 × 7 = 441/567 - Subtract the two like fractions:
1458/567 - 441/567 = 1458 - 441/567 = 1017/567 - After reducing the fraction, the answer is 113/63
- In mixed form: 150/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/7-63/81 18/14-63/81 54/7-63/81 18/21-63/81 90/7-63/81 18/35-63/81 18/49-63/81