Subtract 1/8 from 42/18
1st number: 2 6/18, 2nd number: 1/8
42/18 - 1/8 is 53/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 18 × 4 = 72,
42/18 = 42 × 4/18 × 4 = 168/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
1/8 = 1 × 9/8 × 9 = 9/72 - Subtract the two like fractions:
168/72 - 9/72 = 168 - 9/72 = 159/72 - After reducing the fraction, the answer is 53/24
- In mixed form: 25/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/18-1/8 42/18-2/8 42/36-1/8 42/18-1/16 42/18-3/8 42/54-1/8 42/18-1/24 42/18-5/8 42/90-1/8 42/18-1/40 42/18-7/8 42/18-1/56