Subtract 42/18 from 10/35
1st number: 10/35, 2nd number: 2 6/18
10/35 - 42/18 is -43/21.
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,
10/35 = 10 × 18/35 × 18 = 180/630 - Likewise, for the 2nd fraction, since 18 × 35 = 630,
42/18 = 42 × 35/18 × 35 = 1470/630 - Subtract the two like fractions:
180/630 - 1470/630 = 180 - 1470/630 = -1290/630 - After reducing the fraction, the answer is -43/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/35-42/18 10/35-84/18 10/70-42/18 10/35-42/36 30/35-42/18 10/35-42/54 50/35-42/18 10/35-42/90 70/35-42/18