Subtract 18/63 from 81/12
1st number: 6 9/12, 2nd number: 18/63
81/12 - 18/63 is 181/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 63 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 12 × 21 = 252,
81/12 = 81 × 21/12 × 21 = 1701/252 - Likewise, for the 2nd fraction, since 63 × 4 = 252,
18/63 = 18 × 4/63 × 4 = 72/252 - Subtract the two like fractions:
1701/252 - 72/252 = 1701 - 72/252 = 1629/252 - After reducing the fraction, the answer is 181/28
- In mixed form: 613/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/12-36/63 81/24-18/63 81/12-54/63 81/36-18/63 81/12-90/63 81/60-18/63 81/84-18/63