Subtract 12/18 from 9/63
9/63 - 12/18 is -11/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 63 × 2 = 126,
9/63 = 9 × 2/63 × 2 = 18/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
12/18 = 12 × 7/18 × 7 = 84/126 - Subtract the two like fractions:
18/126 - 84/126 = 18 - 84/126 = -66/126 - After reducing the fraction, the answer is -11/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/63-12/18 9/63-24/18 9/63-12/36 27/63-12/18 9/63-36/18 9/63-12/54 45/63-12/18 9/63-60/18 9/63-12/90 9/63-84/18