Subtract 28/45 from 42/2
1st number: 21 0/2, 2nd number: 28/45
42/2 - 28/45 is 917/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 2 × 45 = 90,
42/2 = 42 × 45/2 × 45 = 1890/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
28/45 = 28 × 2/45 × 2 = 56/90 - Subtract the two like fractions:
1890/90 - 56/90 = 1890 - 56/90 = 1834/90 - After reducing the fraction, the answer is 917/45
- In mixed form: 2017/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/2-28/45 42/2-56/45 42/4-28/45 42/2-28/90 42/2-84/45 42/6-28/45 42/10-28/45 42/14-28/45