Subtract 27/3 from 40/42
1st number: 40/42, 2nd number: 9 0/3
40/42 - 27/3 is -169/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 3 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
40/42 = 40 × 1/42 × 1 = 40/42 - Likewise, for the 2nd fraction, since 3 × 14 = 42,
27/3 = 27 × 14/3 × 14 = 378/42 - Subtract the two like fractions:
40/42 - 378/42 = 40 - 378/42 = -338/42 - After reducing the fraction, the answer is -169/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/42-27/3 40/42-54/3 40/84-27/3 40/42-27/6 40/42-81/3 40/42-27/9 40/42-27/15 40/42-27/21