Subtract 1/84 from 1/20
1/20 - 1/84 is 4/105.
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,
1/20 = 1 × 21/20 × 21 = 21/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
1/84 = 1 × 5/84 × 5 = 5/420 - Subtract the two like fractions:
21/420 - 5/420 = 21 - 5/420 = 16/420 - After reducing the fraction, the answer is 4/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/20-1/84 1/20-2/84 1/40-1/84 3/20-1/84 1/20-3/84 1/60-1/84 5/20-1/84 1/20-5/84 7/20-1/84 1/20-7/84