Subtract 50/45 from 20/63
1st number: 20/63, 2nd number: 1 5/45
20/63 - 50/45 is -50/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 63 × 5 = 315,
20/63 = 20 × 5/63 × 5 = 100/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
50/45 = 50 × 7/45 × 7 = 350/315 - Subtract the two like fractions:
100/315 - 350/315 = 100 - 350/315 = -250/315 - After reducing the fraction, the answer is -50/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/63-50/45 20/63-50/90 60/63-50/45