Subtract 40/42 from 18/3
1st number: 6 0/3, 2nd number: 40/42
18/3 - 40/42 is 106/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 3 × 14 = 42,
18/3 = 18 × 14/3 × 14 = 252/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
40/42 = 40 × 1/42 × 1 = 40/42 - Subtract the two like fractions:
252/42 - 40/42 = 252 - 40/42 = 212/42 - After reducing the fraction, the answer is 106/21
- In mixed form: 51/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/3-40/42 18/3-80/42 18/6-40/42 18/3-40/84 54/3-40/42 18/9-40/42 90/3-40/42 18/15-40/42 18/21-40/42