Subtract 5/21 from 84/20
1st number: 4 4/20, 2nd number: 5/21
84/20 - 5/21 is 416/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
84/20 = 84 × 21/20 × 21 = 1764/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
5/21 = 5 × 20/21 × 20 = 100/420 - Subtract the two like fractions:
1764/420 - 100/420 = 1764 - 100/420 = 1664/420 - After reducing the fraction, the answer is 416/105
- In mixed form: 3101/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20-10/21 84/40-5/21 84/20-5/42 84/20-15/21 84/60-5/21 84/20-5/63 84/20-25/21 84/20-35/21