Subtract 28/18 from 42/35
1st number: 1 7/35, 2nd number: 1 10/18
42/35 - 28/18 is -16/45.
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,
42/35 = 42 × 18/35 × 18 = 756/630 - Likewise, for the 2nd fraction, since 18 × 35 = 630,
28/18 = 28 × 35/18 × 35 = 980/630 - Subtract the two like fractions:
756/630 - 980/630 = 756 - 980/630 = -224/630 - After reducing the fraction, the answer is -16/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/35-28/18 42/35-56/18 42/70-28/18 42/35-28/36 42/35-84/18 42/35-28/54 42/35-28/90