Subtract 8/63 from 1/90
1/90 - 8/63 is -73/630.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
1/90 = 1 × 7/90 × 7 = 7/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
8/63 = 8 × 10/63 × 10 = 80/630 - Subtract the two like fractions:
7/630 - 80/630 = 7 - 80/630 = -73/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/90-8/63 1/90-16/63 3/90-8/63 1/90-24/63 5/90-8/63 1/90-40/63 7/90-8/63 1/90-56/63