Subtract 20/18 from 8/63
1st number: 8/63, 2nd number: 1 2/18
8/63 - 20/18 is -62/63.
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,
8/63 = 8 × 2/63 × 2 = 16/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
20/18 = 20 × 7/18 × 7 = 140/126 - Subtract the two like fractions:
16/126 - 140/126 = 16 - 140/126 = -124/126 - After reducing the fraction, the answer is -62/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/63-20/18 8/63-40/18 8/63-20/36 24/63-20/18 8/63-60/18 8/63-20/54 40/63-20/18 8/63-20/90 56/63-20/18