Subtract 4/42 from 90/2
1st number: 45 0/2, 2nd number: 4/42
90/2 - 4/42 is 943/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
90/2 = 90 × 21/2 × 21 = 1890/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
4/42 = 4 × 1/42 × 1 = 4/42 - Subtract the two like fractions:
1890/42 - 4/42 = 1890 - 4/42 = 1886/42 - After reducing the fraction, the answer is 943/21
- In mixed form: 4419/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/2-8/42 90/4-4/42 90/2-4/84 90/2-12/42 90/6-4/42 90/2-20/42 90/10-4/42 90/2-28/42 90/14-4/42