Subtract 9/18 from 12/70
12/70 - 9/18 is -23/70.
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,
12/70 = 12 × 9/70 × 9 = 108/630 - Likewise, for the 2nd fraction, since 18 × 35 = 630,
9/18 = 9 × 35/18 × 35 = 315/630 - Subtract the two like fractions:
108/630 - 315/630 = 108 - 315/630 = -207/630 - After reducing the fraction, the answer is -23/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/70-9/18 12/70-9/36 36/70-9/18 12/70-27/18 12/70-9/54 60/70-9/18 12/70-45/18 12/70-9/90 84/70-9/18 12/70-63/18