Subtract 80/42 from 42/9
1st number: 4 6/9, 2nd number: 1 38/42
42/9 - 80/42 is 58/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 9 × 14 = 126,
42/9 = 42 × 14/9 × 14 = 588/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
80/42 = 80 × 3/42 × 3 = 240/126 - Subtract the two like fractions:
588/126 - 240/126 = 588 - 240/126 = 348/126 - After reducing the fraction, the answer is 58/21
- In mixed form: 216/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/9-80/42 42/18-80/42 42/9-80/84 42/27-80/42 42/45-80/42 42/63-80/42