Subtract 42/20 from 30/2
1st number: 15 0/2, 2nd number: 2 2/20
30/2 - 42/20 is 129/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 2 × 10 = 20,
30/2 = 30 × 10/2 × 10 = 300/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
42/20 = 42 × 1/20 × 1 = 42/20 - Subtract the two like fractions:
300/20 - 42/20 = 300 - 42/20 = 258/20 - After reducing the fraction, the answer is 129/10
- In mixed form: 129/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/2-42/20 30/2-84/20 30/4-42/20 30/2-42/40 90/2-42/20 30/6-42/20 30/2-42/60 30/10-42/20 30/14-42/20