Subtract 15/9 from 10/70
1st number: 10/70, 2nd number: 1 6/9
10/70 - 15/9 is -32/21.
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,
10/70 = 10 × 9/70 × 9 = 90/630 - Likewise, for the 2nd fraction, since 9 × 70 = 630,
15/9 = 15 × 70/9 × 70 = 1050/630 - Subtract the two like fractions:
90/630 - 1050/630 = 90 - 1050/630 = -960/630 - After reducing the fraction, the answer is -32/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/70-15/9 10/70-30/9 10/70-15/18 30/70-15/9 10/70-45/9 10/70-15/27 50/70-15/9 10/70-75/9 10/70-15/45 10/70-15/63