Subtract 35/63 from 12/42
12/42 - 35/63 is -17/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 63 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
12/42 = 12 × 3/42 × 3 = 36/126 - Likewise, for the 2nd fraction, since 63 × 2 = 126,
35/63 = 35 × 2/63 × 2 = 70/126 - Subtract the two like fractions:
36/126 - 70/126 = 36 - 70/126 = -34/126 - After reducing the fraction, the answer is -17/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/42-35/63 12/42-70/63 12/84-35/63 36/42-35/63 60/42-35/63 84/42-35/63