Subtract 75/63 from 12/42
1st number: 12/42, 2nd number: 1 12/63
12/42 - 75/63 is -19/21.
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,
75/63 = 75 × 2/63 × 2 = 150/126 - Subtract the two like fractions:
36/126 - 150/126 = 36 - 150/126 = -114/126 - After reducing the fraction, the answer is -19/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/42-75/63 12/84-75/63 36/42-75/63 60/42-75/63 84/42-75/63