Subtract 7/63 from 2/90
2/90 - 7/63 is -4/45.
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,
2/90 = 2 × 7/90 × 7 = 14/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
7/63 = 7 × 10/63 × 10 = 70/630 - Subtract the two like fractions:
14/630 - 70/630 = 14 - 70/630 = -56/630 - After reducing the fraction, the answer is -4/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/90-7/63 2/90-14/63 6/90-7/63 2/90-21/63 10/90-7/63 2/90-35/63 14/90-7/63 2/90-49/63