Subtract 4/7 from 42/9
1st number: 4 6/9, 2nd number: 4/7
42/9 - 4/7 is 86/21.
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,
4/7 = 4 × 9/7 × 9 = 36/63 - Subtract the two like fractions:
294/63 - 36/63 = 294 - 36/63 = 258/63 - After reducing the fraction, the answer is 86/21
- In mixed form: 42/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/9-4/7 42/9-8/7 42/18-4/7 42/9-4/14 42/9-12/7 42/27-4/7 42/9-4/21 42/9-20/7 42/45-4/7 42/9-4/35 42/9-28/7 42/63-4/7 42/9-4/49