Subtract 45/4 from 1/42
1st number: 1/42, 2nd number: 11 1/4
1/42 - 45/4 is -943/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
1/42 = 1 × 2/42 × 2 = 2/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
45/4 = 45 × 21/4 × 21 = 945/84 - Subtract the two like fractions:
2/84 - 945/84 = 2 - 945/84 = -943/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/42-45/4 1/42-90/4 1/84-45/4 1/42-45/8 3/42-45/4 1/42-45/12 5/42-45/4 1/42-45/20 7/42-45/4 1/42-45/28