Subtract 42/18 from 9/30
1st number: 9/30, 2nd number: 2 6/18
9/30 - 42/18 is -61/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
9/30 = 9 × 3/30 × 3 = 27/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
42/18 = 42 × 5/18 × 5 = 210/90 - Subtract the two like fractions:
27/90 - 210/90 = 27 - 210/90 = -183/90 - After reducing the fraction, the answer is -61/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/30-42/18 9/30-84/18 9/60-42/18 9/30-42/36 27/30-42/18 9/90-42/18 9/30-42/54 45/30-42/18 9/30-42/90 63/30-42/18