Subtract 42/84 from 30/2
1st number: 15 0/2, 2nd number: 42/84
30/2 - 42/84 is 29/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 2 × 42 = 84,
30/2 = 30 × 42/2 × 42 = 1260/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
42/84 = 42 × 1/84 × 1 = 42/84 - Subtract the two like fractions:
1260/84 - 42/84 = 1260 - 42/84 = 1218/84 - After reducing the fraction, the answer is 29/2
- In mixed form: 141/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/2-42/84 30/4-42/84 90/2-42/84 30/6-42/84 30/10-42/84 30/14-42/84