Subtract 5/18 from 18/70
18/70 - 5/18 is -13/630.
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,
18/70 = 18 × 9/70 × 9 = 162/630 - Likewise, for the 2nd fraction, since 18 × 35 = 630,
5/18 = 5 × 35/18 × 35 = 175/630 - Subtract the two like fractions:
162/630 - 175/630 = 162 - 175/630 = -13/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/70-5/18 18/70-10/18 18/70-5/36 54/70-5/18 18/70-15/18 18/70-5/54 90/70-5/18 18/70-25/18 18/70-5/90 18/70-35/18