Subtract 18/8 from 42/9
1st number: 4 6/9, 2nd number: 2 2/8
42/9 - 18/8 is 29/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 9 × 8 = 72,
42/9 = 42 × 8/9 × 8 = 336/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
18/8 = 18 × 9/8 × 9 = 162/72 - Subtract the two like fractions:
336/72 - 162/72 = 336 - 162/72 = 174/72 - After reducing the fraction, the answer is 29/12
- In mixed form: 25/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/9-18/8 42/9-36/8 42/18-18/8 42/9-18/16 42/9-54/8 42/27-18/8 42/9-18/24 42/9-90/8 42/45-18/8 42/9-18/40 42/63-18/8 42/9-18/56