Subtract 18/70 from 7/18
7/18 - 18/70 is 83/630.
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,
7/18 = 7 × 35/18 × 35 = 245/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
18/70 = 18 × 9/70 × 9 = 162/630 - Subtract the two like fractions:
245/630 - 162/630 = 245 - 162/630 = 83/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/18-18/70 7/18-36/70 7/36-18/70 21/18-18/70 7/18-54/70 7/54-18/70 35/18-18/70 7/18-90/70 7/90-18/70 49/18-18/70