Subtract 42/4 from 30/10
1st number: 3 0/10, 2nd number: 10 2/4
30/10 - 42/4 is -15/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 4 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 10 × 2 = 20,
30/10 = 30 × 2/10 × 2 = 60/20 - Likewise, for the 2nd fraction, since 4 × 5 = 20,
42/4 = 42 × 5/4 × 5 = 210/20 - Subtract the two like fractions:
60/20 - 210/20 = 60 - 210/20 = -150/20 - After reducing the fraction, the answer is -15/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/10-42/4 30/10-84/4 30/20-42/4 30/10-42/8 90/10-42/4 30/10-42/12 30/50-42/4 30/10-42/20 30/70-42/4 30/10-42/28