Subtract 21/84 from 30/2
1st number: 15 0/2, 2nd number: 21/84
30/2 - 21/84 is 59/4.
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,
21/84 = 21 × 1/84 × 1 = 21/84 - Subtract the two like fractions:
1260/84 - 21/84 = 1260 - 21/84 = 1239/84 - After reducing the fraction, the answer is 59/4
- In mixed form: 143/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/2-21/84 30/2-42/84 30/4-21/84 90/2-21/84 30/2-63/84 30/6-21/84 30/10-21/84 30/14-21/84