Subtract 4/84 from 28/20
1st number: 1 8/20, 2nd number: 4/84
28/20 - 4/84 is 142/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
28/20 = 28 × 21/20 × 21 = 588/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
4/84 = 4 × 5/84 × 5 = 20/420 - Subtract the two like fractions:
588/420 - 20/420 = 588 - 20/420 = 568/420 - After reducing the fraction, the answer is 142/105
- In mixed form: 137/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/20-4/84 28/20-8/84 28/40-4/84 84/20-4/84 28/20-12/84 28/60-4/84 28/20-20/84 28/20-28/84