Subtract 7/18 from 5/70
5/70 - 7/18 is -20/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 18 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
5/70 = 5 × 9/70 × 9 = 45/630 - Likewise, for the 2nd fraction, since 18 × 35 = 630,
7/18 = 7 × 35/18 × 35 = 245/630 - Subtract the two like fractions:
45/630 - 245/630 = 45 - 245/630 = -200/630 - After reducing the fraction, the answer is -20/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/70-7/18 5/70-14/18 5/70-7/36 15/70-7/18 5/70-21/18 5/70-7/54 25/70-7/18 5/70-35/18 5/70-7/90 35/70-7/18 5/70-49/18