Subtract 36/42 from 2/18
2/18 - 36/42 is -47/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
2/18 = 2 × 7/18 × 7 = 14/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
36/42 = 36 × 3/42 × 3 = 108/126 - Subtract the two like fractions:
14/126 - 108/126 = 14 - 108/126 = -94/126 - After reducing the fraction, the answer is -47/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/18-36/42 2/18-72/42 2/36-36/42 2/18-36/84 6/18-36/42 2/54-36/42 10/18-36/42 2/90-36/42 14/18-36/42