Subtract 3/9 from 12/70
12/70 - 3/9 is -17/105.
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,
12/70 = 12 × 9/70 × 9 = 108/630 - Likewise, for the 2nd fraction, since 9 × 70 = 630,
3/9 = 3 × 70/9 × 70 = 210/630 - Subtract the two like fractions:
108/630 - 210/630 = 108 - 210/630 = -102/630 - After reducing the fraction, the answer is -17/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/70-3/9 12/70-6/9 12/70-3/18 36/70-3/9 12/70-3/27 60/70-3/9 12/70-15/9 12/70-3/45 84/70-3/9 12/70-21/9 12/70-3/63