Subtract 45/42 from 18/9
1st number: 2 0/9, 2nd number: 1 3/42
18/9 - 45/42 is 13/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 9 × 14 = 126,
18/9 = 18 × 14/9 × 14 = 252/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
45/42 = 45 × 3/42 × 3 = 135/126 - Subtract the two like fractions:
252/126 - 135/126 = 252 - 135/126 = 117/126 - After reducing the fraction, the answer is 13/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/9-45/42 18/9-90/42 18/9-45/84 54/9-45/42 18/27-45/42 90/9-45/42 18/45-45/42 18/63-45/42