Subtract 18/9 from 24/42
1st number: 24/42, 2nd number: 2 0/9
24/42 - 18/9 is -10/7.
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,
24/42 = 24 × 3/42 × 3 = 72/126 - Likewise, for the 2nd fraction, since 9 × 14 = 126,
18/9 = 18 × 14/9 × 14 = 252/126 - Subtract the two like fractions:
72/126 - 252/126 = 72 - 252/126 = -180/126 - After reducing the fraction, the answer is -10/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/42-18/9 24/42-36/9 24/84-18/9 72/42-18/9 24/42-54/9 24/42-18/27 24/42-90/9 24/42-18/45 24/42-18/63