Subtract 8/30 from 7/63
7/63 - 8/30 is -7/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 30 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
7/63 = 7 × 10/63 × 10 = 70/630 - Likewise, for the 2nd fraction, since 30 × 21 = 630,
8/30 = 8 × 21/30 × 21 = 168/630 - Subtract the two like fractions:
70/630 - 168/630 = 70 - 168/630 = -98/630 - After reducing the fraction, the answer is -7/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/63-8/30 7/63-16/30 7/63-8/60 21/63-8/30 7/63-24/30 7/63-8/90 35/63-8/30 7/63-40/30 49/63-8/30 7/63-56/30