Subtract 30/9 from 32/42
1st number: 32/42, 2nd number: 3 3/9
32/42 - 30/9 is -18/7.
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,
32/42 = 32 × 3/42 × 3 = 96/126 - Likewise, for the 2nd fraction, since 9 × 14 = 126,
30/9 = 30 × 14/9 × 14 = 420/126 - Subtract the two like fractions:
96/126 - 420/126 = 96 - 420/126 = -324/126 - After reducing the fraction, the answer is -18/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 64/42-30/9 32/42-60/9 32/84-30/9 32/42-30/18 96/42-30/9 32/42-90/9 32/42-30/27 32/42-30/45 32/42-30/63