Subtract 2/45 from 42/2
1st number: 21 0/2, 2nd number: 2/45
42/2 - 2/45 is 943/45.
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,
2/45 = 2 × 2/45 × 2 = 4/90 - Subtract the two like fractions:
1890/90 - 4/90 = 1890 - 4/90 = 1886/90 - After reducing the fraction, the answer is 943/45
- In mixed form: 2043/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/2-2/45 42/2-4/45 42/4-2/45 42/2-2/90 42/2-6/45 42/6-2/45 42/2-10/45 42/10-2/45 42/2-14/45 42/14-2/45