Subtract 50/18 from 20/70
1st number: 20/70, 2nd number: 2 14/18
20/70 - 50/18 is -157/63.
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,
20/70 = 20 × 9/70 × 9 = 180/630 - Likewise, for the 2nd fraction, since 18 × 35 = 630,
50/18 = 50 × 35/18 × 35 = 1750/630 - Subtract the two like fractions:
180/630 - 1750/630 = 180 - 1750/630 = -1570/630 - After reducing the fraction, the answer is -157/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/70-50/18 20/70-50/36 60/70-50/18 20/70-50/54 20/70-50/90