Subtract 21/35 from 16/84
16/84 - 21/35 is -43/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 35 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
16/84 = 16 × 5/84 × 5 = 80/420 - Likewise, for the 2nd fraction, since 35 × 12 = 420,
21/35 = 21 × 12/35 × 12 = 252/420 - Subtract the two like fractions:
80/420 - 252/420 = 80 - 252/420 = -172/420 - After reducing the fraction, the answer is -43/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/84-21/35 16/84-42/35 16/84-21/70 48/84-21/35 16/84-63/35 80/84-21/35