Subtract 5/9 from 30/70
30/70 - 5/9 is -8/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 9 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
30/70 = 30 × 9/70 × 9 = 270/630 - Likewise, for the 2nd fraction, since 9 × 70 = 630,
5/9 = 5 × 70/9 × 70 = 350/630 - Subtract the two like fractions:
270/630 - 350/630 = 270 - 350/630 = -80/630 - After reducing the fraction, the answer is -8/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/70-5/9 30/70-10/9 30/70-5/18 90/70-5/9 30/70-15/9 30/70-5/27 30/70-25/9 30/70-5/45 30/70-35/9 30/70-5/63