Subtract 30/3 from 15/42
1st number: 15/42, 2nd number: 10 0/3
15/42 - 30/3 is -135/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 3 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
15/42 = 15 × 1/42 × 1 = 15/42 - Likewise, for the 2nd fraction, since 3 × 14 = 42,
30/3 = 30 × 14/3 × 14 = 420/42 - Subtract the two like fractions:
15/42 - 420/42 = 15 - 420/42 = -405/42 - After reducing the fraction, the answer is -135/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/42-30/3 15/42-60/3 15/84-30/3 15/42-30/6 45/42-30/3 15/42-90/3 15/42-30/9 75/42-30/3 15/42-30/15 15/42-30/21