Subtract 36/18 from 10/42
1st number: 10/42, 2nd number: 2 0/18
10/42 - 36/18 is -37/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
10/42 = 10 × 3/42 × 3 = 30/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
36/18 = 36 × 7/18 × 7 = 252/126 - Subtract the two like fractions:
30/126 - 252/126 = 30 - 252/126 = -222/126 - After reducing the fraction, the answer is -37/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/42-36/18 10/42-72/18 10/84-36/18 30/42-36/18 10/42-36/54 50/42-36/18 10/42-36/90 70/42-36/18