Subtract 90/70 from 2/63
1st number: 2/63, 2nd number: 1 20/70
2/63 - 90/70 is -79/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
2/63 = 2 × 10/63 × 10 = 20/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
90/70 = 90 × 9/70 × 9 = 810/630 - Subtract the two like fractions:
20/630 - 810/630 = 20 - 810/630 = -790/630 - After reducing the fraction, the answer is -79/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/63-90/70 6/63-90/70 10/63-90/70 14/63-90/70