Subtract 7/9 from 42/8
1st number: 5 2/8, 2nd number: 7/9
42/8 - 7/9 is 161/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 9 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 9 × 8 = 72,
7/9 = 7 × 8/9 × 8 = 56/72 - Subtract the two like fractions:
378/72 - 56/72 = 378 - 56/72 = 322/72 - After reducing the fraction, the answer is 161/36
- In mixed form: 417/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/8-7/9 42/8-14/9 42/16-7/9 42/8-7/18 42/8-21/9 42/24-7/9 42/8-7/27 42/8-35/9 42/40-7/9 42/8-7/45 42/8-49/9 42/56-7/9 42/8-7/63