Subtract 1/42 from 30/9
1st number: 3 3/9, 2nd number: 1/42
30/9 - 1/42 is 139/42.
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,
30/9 = 30 × 14/9 × 14 = 420/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
1/42 = 1 × 3/42 × 3 = 3/126 - Subtract the two like fractions:
420/126 - 3/126 = 420 - 3/126 = 417/126 - After reducing the fraction, the answer is 139/42
- In mixed form: 313/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/9-1/42 30/9-2/42 30/18-1/42 30/9-1/84 90/9-1/42 30/9-3/42 30/27-1/42 30/9-5/42 30/45-1/42 30/9-7/42 30/63-1/42