Subtract 48/42 from 18/36
1st number: 18/36, 2nd number: 1 6/42
18/36 - 48/42 is -9/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 42 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
18/36 = 18 × 7/36 × 7 = 126/252 - Likewise, for the 2nd fraction, since 42 × 6 = 252,
48/42 = 48 × 6/42 × 6 = 288/252 - Subtract the two like fractions:
126/252 - 288/252 = 126 - 288/252 = -162/252 - After reducing the fraction, the answer is -9/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/36-96/42 18/72-48/42 18/36-48/84 54/36-48/42 90/36-48/42