Subtract 8/21 from 84/2
1st number: 42 0/2, 2nd number: 8/21
84/2 - 8/21 is 874/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
84/2 = 84 × 21/2 × 21 = 1764/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
8/21 = 8 × 2/21 × 2 = 16/42 - Subtract the two like fractions:
1764/42 - 16/42 = 1764 - 16/42 = 1748/42 - After reducing the fraction, the answer is 874/21
- In mixed form: 4113/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/2-16/21 84/4-8/21 84/2-8/42 84/2-24/21 84/6-8/21 84/2-8/63 84/2-40/21 84/10-8/21 84/2-56/21 84/14-8/21