Subtract 30/3 from 42/54
1st number: 42/54, 2nd number: 10 0/3
42/54 - 30/3 is -83/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 3 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 54 × 1 = 54,
42/54 = 42 × 1/54 × 1 = 42/54 - Likewise, for the 2nd fraction, since 3 × 18 = 54,
30/3 = 30 × 18/3 × 18 = 540/54 - Subtract the two like fractions:
42/54 - 540/54 = 42 - 540/54 = -498/54 - After reducing the fraction, the answer is -83/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/54-30/3 42/54-60/3 42/54-30/6 42/54-90/3 42/54-30/9 42/54-30/15 42/54-30/21