Subtract 54/42 from 3/4
1st number: 3/4, 2nd number: 1 12/42
3/4 - 54/42 is -15/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
3/4 = 3 × 21/4 × 21 = 63/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
54/42 = 54 × 2/42 × 2 = 108/84 - Subtract the two like fractions:
63/84 - 108/84 = 63 - 108/84 = -45/84 - After reducing the fraction, the answer is -15/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/4-54/42 3/8-54/42 3/4-54/84 9/4-54/42 3/12-54/42 15/4-54/42 3/20-54/42 21/4-54/42 3/28-54/42