Subtract 20/70 from 2/18
2/18 - 20/70 is -11/63.
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,
2/18 = 2 × 35/18 × 35 = 70/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
20/70 = 20 × 9/70 × 9 = 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: 4/18-20/70 2/18-40/70 2/36-20/70 6/18-20/70 2/18-60/70 2/54-20/70 10/18-20/70 2/90-20/70 14/18-20/70