Subtract 84/20 from 8/84
1st number: 8/84, 2nd number: 4 4/20
8/84 - 84/20 is -431/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
8/84 = 8 × 5/84 × 5 = 40/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
84/20 = 84 × 21/20 × 21 = 1764/420 - Subtract the two like fractions:
40/420 - 1764/420 = 40 - 1764/420 = -1724/420 - After reducing the fraction, the answer is -431/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/84-84/20 8/84-84/40 24/84-84/20 8/84-84/60 40/84-84/20 56/84-84/20