Subtract 28/42 from 16/20
16/20 - 28/42 is 2/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 42 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
16/20 = 16 × 21/20 × 21 = 336/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
28/42 = 28 × 10/42 × 10 = 280/420 - Subtract the two like fractions:
336/420 - 280/420 = 336 - 280/420 = 56/420 - After reducing the fraction, the answer is 2/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/20-28/42 16/20-56/42 16/40-28/42 16/20-28/84 48/20-28/42 16/20-84/42 16/60-28/42 80/20-28/42