Subtract 81/18 from 12/35
1st number: 12/35, 2nd number: 4 9/18
12/35 - 81/18 is -291/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 18 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 35 × 18 = 630,
12/35 = 12 × 18/35 × 18 = 216/630 - Likewise, for the 2nd fraction, since 18 × 35 = 630,
81/18 = 81 × 35/18 × 35 = 2835/630 - Subtract the two like fractions:
216/630 - 2835/630 = 216 - 2835/630 = -2619/630 - After reducing the fraction, the answer is -291/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/35-81/18 12/70-81/18 12/35-81/36 36/35-81/18 12/35-81/54 60/35-81/18 12/35-81/90 84/35-81/18