Subtract 12/42 from 8/9
8/9 - 12/42 is 38/63.
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,
8/9 = 8 × 14/9 × 14 = 112/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
12/42 = 12 × 3/42 × 3 = 36/126 - Subtract the two like fractions:
112/126 - 36/126 = 112 - 36/126 = 76/126 - After reducing the fraction, the answer is 38/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/9-12/42 8/9-24/42 8/18-12/42 8/9-12/84 24/9-12/42 8/9-36/42 8/27-12/42 40/9-12/42 8/9-60/42 8/45-12/42 56/9-12/42 8/9-84/42 8/63-12/42