Subtract 12/18 from 81/35
1st number: 2 11/35, 2nd number: 12/18
81/35 - 12/18 is 173/105.
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,
81/35 = 81 × 18/35 × 18 = 1458/630 - Likewise, for the 2nd fraction, since 18 × 35 = 630,
12/18 = 12 × 35/18 × 35 = 420/630 - Subtract the two like fractions:
1458/630 - 420/630 = 1458 - 420/630 = 1038/630 - After reducing the fraction, the answer is 173/105
- In mixed form: 168/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/35-24/18 81/70-12/18 81/35-12/36 81/35-36/18 81/35-12/54 81/35-60/18 81/35-12/90 81/35-84/18