Subtract 1/7 from 42/9
1st number: 4 6/9, 2nd number: 1/7
42/9 - 1/7 is 95/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 7 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
42/9 = 42 × 7/9 × 7 = 294/63 - Likewise, for the 2nd fraction, since 7 × 9 = 63,
1/7 = 1 × 9/7 × 9 = 9/63 - Subtract the two like fractions:
294/63 - 9/63 = 294 - 9/63 = 285/63 - After reducing the fraction, the answer is 95/21
- In mixed form: 411/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/9-1/7 42/9-2/7 42/18-1/7 42/9-1/14 42/9-3/7 42/27-1/7 42/9-1/21 42/9-5/7 42/45-1/7 42/9-1/35 42/63-1/7 42/9-1/49