Subtract 9/63 from 5/42
5/42 - 9/63 is -1/42.
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,
5/42 = 5 × 3/42 × 3 = 15/126 - Likewise, for the 2nd fraction, since 63 × 2 = 126,
9/63 = 9 × 2/63 × 2 = 18/126 - Subtract the two like fractions:
15/126 - 18/126 = 15 - 18/126 = -3/126 - After reducing the fraction, the answer is -1/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/42-9/63 5/42-18/63 5/84-9/63 15/42-9/63 5/42-27/63 25/42-9/63 5/42-45/63 35/42-9/63