Subtract 3/42 from 40/9
1st number: 4 4/9, 2nd number: 3/42
40/9 - 3/42 is 551/126.
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,
40/9 = 40 × 14/9 × 14 = 560/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
3/42 = 3 × 3/42 × 3 = 9/126 - Subtract the two like fractions:
560/126 - 9/126 = 560 - 9/126 = 551/126 - In mixed form: 447/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/9-3/42 40/9-6/42 40/18-3/42 40/9-3/84 40/9-9/42 40/27-3/42 40/9-15/42 40/45-3/42 40/9-21/42 40/63-3/42