Subtract 7/9 from 4/42
4/42 - 7/9 is -43/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 9 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
4/42 = 4 × 3/42 × 3 = 12/126 - Likewise, for the 2nd fraction, since 9 × 14 = 126,
7/9 = 7 × 14/9 × 14 = 98/126 - Subtract the two like fractions:
12/126 - 98/126 = 12 - 98/126 = -86/126 - After reducing the fraction, the answer is -43/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/42-7/9 4/42-14/9 4/84-7/9 4/42-7/18 12/42-7/9 4/42-21/9 4/42-7/27 20/42-7/9 4/42-35/9 4/42-7/45 28/42-7/9 4/42-49/9 4/42-7/63