Subtract 20/6 from 15/63
1st number: 15/63, 2nd number: 3 2/6
15/63 - 20/6 is -65/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 6 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 63 × 2 = 126,
15/63 = 15 × 2/63 × 2 = 30/126 - Likewise, for the 2nd fraction, since 6 × 21 = 126,
20/6 = 20 × 21/6 × 21 = 420/126 - Subtract the two like fractions:
30/126 - 420/126 = 30 - 420/126 = -390/126 - After reducing the fraction, the answer is -65/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/63-20/6 15/63-40/6 15/63-20/12 45/63-20/6 15/63-60/6 15/63-20/18 75/63-20/6 15/63-20/30 15/63-20/42