Subtract 4/18 from 45/63
45/63 - 4/18 is 31/63.
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,
45/63 = 45 × 2/63 × 2 = 90/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
4/18 = 4 × 7/18 × 7 = 28/126 - Subtract the two like fractions:
90/126 - 28/126 = 90 - 28/126 = 62/126 - After reducing the fraction, the answer is 31/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/63-4/18 45/63-8/18 45/63-4/36 45/63-12/18 45/63-4/54 45/63-20/18 45/63-4/90 45/63-28/18