Subtract 2/7 from 10/90
10/90 - 2/7 is -11/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 7 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
10/90 = 10 × 7/90 × 7 = 70/630 - Likewise, for the 2nd fraction, since 7 × 90 = 630,
2/7 = 2 × 90/7 × 90 = 180/630 - Subtract the two like fractions:
70/630 - 180/630 = 70 - 180/630 = -110/630 - After reducing the fraction, the answer is -11/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/90-2/7 10/90-4/7 10/90-2/14 30/90-2/7 10/90-6/7 10/90-2/21 50/90-2/7 10/90-10/7 10/90-2/35 70/90-2/7 10/90-14/7 10/90-2/49