Subtract 49/10 from 42/18
1st number: 2 6/18, 2nd number: 4 9/10
42/18 - 49/10 is -77/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
42/18 = 42 × 5/18 × 5 = 210/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
49/10 = 49 × 9/10 × 9 = 441/90 - Subtract the two like fractions:
210/90 - 441/90 = 210 - 441/90 = -231/90 - After reducing the fraction, the answer is -77/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/18-49/10 42/18-98/10 42/36-49/10 42/18-49/20 42/54-49/10 42/18-49/30 42/90-49/10 42/18-49/50 42/18-49/70