Subtract 42/18 from 6/30
1st number: 6/30, 2nd number: 2 6/18
6/30 - 42/18 is -32/15.
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,
6/30 = 6 × 3/30 × 3 = 18/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
42/18 = 42 × 5/18 × 5 = 210/90 - Subtract the two like fractions:
18/90 - 210/90 = 18 - 210/90 = -192/90 - After reducing the fraction, the answer is -32/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/30-42/18 6/30-84/18 6/60-42/18 6/30-42/36 18/30-42/18 6/90-42/18 6/30-42/54 6/30-42/90 42/30-42/18