Subtract 42/18 from 3/10
1st number: 3/10, 2nd number: 2 6/18
3/10 - 42/18 is -61/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
3/10 = 3 × 9/10 × 9 = 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: 6/10-42/18 3/10-84/18 3/20-42/18 3/10-42/36 9/10-42/18 3/30-42/18 3/10-42/54 15/10-42/18 3/50-42/18 3/10-42/90 21/10-42/18 3/70-42/18