Subtract 12/18 from 27/70
27/70 - 12/18 is -59/210.
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,
27/70 = 27 × 9/70 × 9 = 243/630 - Likewise, for the 2nd fraction, since 18 × 35 = 630,
12/18 = 12 × 35/18 × 35 = 420/630 - Subtract the two like fractions:
243/630 - 420/630 = 243 - 420/630 = -177/630 - After reducing the fraction, the answer is -59/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/70-12/18 27/70-24/18 27/70-12/36 81/70-12/18 27/70-36/18 27/70-12/54 27/70-60/18 27/70-12/90 27/70-84/18