Subtract 63/9 from 45/42
1st number: 1 3/42, 2nd number: 7 0/9
45/42 - 63/9 is -83/14.
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,
45/42 = 45 × 3/42 × 3 = 135/126 - Likewise, for the 2nd fraction, since 9 × 14 = 126,
63/9 = 63 × 14/9 × 14 = 882/126 - Subtract the two like fractions:
135/126 - 882/126 = 135 - 882/126 = -747/126 - After reducing the fraction, the answer is -83/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42-63/9 45/84-63/9 45/42-63/18 45/42-63/27 45/42-63/45