Subtract 63/70 from 10/18
10/18 - 63/70 is -31/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 18 × 35 = 630,
10/18 = 10 × 35/18 × 35 = 350/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
63/70 = 63 × 9/70 × 9 = 567/630 - Subtract the two like fractions:
350/630 - 567/630 = 350 - 567/630 = -217/630 - After reducing the fraction, the answer is -31/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/18-63/70 10/36-63/70 30/18-63/70 10/54-63/70 50/18-63/70 10/90-63/70 70/18-63/70