Subtract 9/54 from 6/42
6/42 - 9/54 is -1/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 42 × 9 = 378,
6/42 = 6 × 9/42 × 9 = 54/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
9/54 = 9 × 7/54 × 7 = 63/378 - Subtract the two like fractions:
54/378 - 63/378 = 54 - 63/378 = -9/378 - After reducing the fraction, the answer is -1/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/42-9/54 6/42-18/54 6/84-9/54 18/42-9/54 6/42-27/54 30/42-9/54 6/42-45/54 6/42-63/54