Subtract 54/4 from 12/42
1st number: 12/42, 2nd number: 13 2/4
12/42 - 54/4 is -185/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
12/42 = 12 × 2/42 × 2 = 24/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
54/4 = 54 × 21/4 × 21 = 1134/84 - Subtract the two like fractions:
24/84 - 1134/84 = 24 - 1134/84 = -1110/84 - After reducing the fraction, the answer is -185/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/42-54/4 12/84-54/4 12/42-54/8 36/42-54/4 12/42-54/12 60/42-54/4 12/42-54/20 84/42-54/4 12/42-54/28