Subtract 5/18 from 42/8
1st number: 5 2/8, 2nd number: 5/18
42/8 - 5/18 is 179/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 18 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 8 × 9 = 72,
42/8 = 42 × 9/8 × 9 = 378/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
5/18 = 5 × 4/18 × 4 = 20/72 - Subtract the two like fractions:
378/72 - 20/72 = 378 - 20/72 = 358/72 - After reducing the fraction, the answer is 179/36
- In mixed form: 435/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/8-5/18 42/8-10/18 42/16-5/18 42/8-5/36 42/8-15/18 42/24-5/18 42/8-5/54 42/8-25/18 42/40-5/18 42/8-5/90 42/8-35/18 42/56-5/18