Subtract 16/20 from 1/84
1/84 - 16/20 is -331/420.
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,
1/84 = 1 × 5/84 × 5 = 5/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
16/20 = 16 × 21/20 × 21 = 336/420 - Subtract the two like fractions:
5/420 - 336/420 = 5 - 336/420 = -331/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/84-16/20 1/84-32/20 1/84-16/40 3/84-16/20 1/84-48/20 1/84-16/60 5/84-16/20 1/84-80/20 7/84-16/20