Subtract 18/84 from 42/2
1st number: 21 0/2, 2nd number: 18/84
42/2 - 18/84 is 291/14.
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,
42/2 = 42 × 42/2 × 42 = 1764/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
18/84 = 18 × 1/84 × 1 = 18/84 - Subtract the two like fractions:
1764/84 - 18/84 = 1764 - 18/84 = 1746/84 - After reducing the fraction, the answer is 291/14
- In mixed form: 2011/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/2-18/84 42/2-36/84 42/4-18/84 42/2-54/84 42/6-18/84 42/2-90/84 42/10-18/84 42/14-18/84