Subtract 18/84 from 20/5
1st number: 4 0/5, 2nd number: 18/84
20/5 - 18/84 is 53/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 5 × 84 = 420,
20/5 = 20 × 84/5 × 84 = 1680/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
18/84 = 18 × 5/84 × 5 = 90/420 - Subtract the two like fractions:
1680/420 - 90/420 = 1680 - 90/420 = 1590/420 - After reducing the fraction, the answer is 53/14
- In mixed form: 311/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/5-18/84 20/5-36/84 20/10-18/84 60/5-18/84 20/5-54/84 20/15-18/84 20/5-90/84 20/25-18/84 20/35-18/84