Subtract 18/9 from 12/63
1st number: 12/63, 2nd number: 2 0/9
12/63 - 18/9 is -38/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 63 × 1 = 63,
12/63 = 12 × 1/63 × 1 = 12/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
18/9 = 18 × 7/9 × 7 = 126/63 - Subtract the two like fractions:
12/63 - 126/63 = 12 - 126/63 = -114/63 - After reducing the fraction, the answer is -38/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/63-18/9 12/63-36/9 36/63-18/9 12/63-54/9 12/63-18/27 60/63-18/9 12/63-90/9 12/63-18/45 84/63-18/9 12/63-18/63