Subtract 3/12 from 18/63
18/63 - 3/12 is 1/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 12 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 63 × 4 = 252,
18/63 = 18 × 4/63 × 4 = 72/252 - Likewise, for the 2nd fraction, since 12 × 21 = 252,
3/12 = 3 × 21/12 × 21 = 63/252 - Subtract the two like fractions:
72/252 - 63/252 = 72 - 63/252 = 9/252 - After reducing the fraction, the answer is 1/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/63-3/12 18/63-6/12 18/63-3/24 54/63-3/12 18/63-9/12 18/63-3/36 90/63-3/12 18/63-15/12 18/63-3/60 18/63-21/12 18/63-3/84