Subtract 28/20 from 42/2
1st number: 21 0/2, 2nd number: 1 8/20
42/2 - 28/20 is 98/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 2 × 10 = 20,
42/2 = 42 × 10/2 × 10 = 420/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
28/20 = 28 × 1/20 × 1 = 28/20 - Subtract the two like fractions:
420/20 - 28/20 = 420 - 28/20 = 392/20 - After reducing the fraction, the answer is 98/5
- In mixed form: 193/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/2-28/20 42/2-56/20 42/4-28/20 42/2-28/40 42/2-84/20 42/6-28/20 42/2-28/60 42/10-28/20 42/14-28/20