Subtract 54/30 from 12/42
1st number: 12/42, 2nd number: 1 24/30
12/42 - 54/30 is -53/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
12/42 = 12 × 5/42 × 5 = 60/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
54/30 = 54 × 7/30 × 7 = 378/210 - Subtract the two like fractions:
60/210 - 378/210 = 60 - 378/210 = -318/210 - After reducing the fraction, the answer is -53/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/42-54/30 12/84-54/30 12/42-54/60 36/42-54/30 12/42-54/90 60/42-54/30 84/42-54/30