Subtract 54/35 from 42/30
1st number: 1 12/30, 2nd number: 1 19/35
42/30 - 54/35 is -1/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 35 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
42/30 = 42 × 7/30 × 7 = 294/210 - Likewise, for the 2nd fraction, since 35 × 6 = 210,
54/35 = 54 × 6/35 × 6 = 324/210 - Subtract the two like fractions:
294/210 - 324/210 = 294 - 324/210 = -30/210 - After reducing the fraction, the answer is -1/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/30-54/35 42/60-54/35 42/30-54/70 42/90-54/35