Subtract 30/42 from 12/3
1st number: 4 0/3, 2nd number: 30/42
12/3 - 30/42 is 23/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 3 × 14 = 42,
12/3 = 12 × 14/3 × 14 = 168/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
30/42 = 30 × 1/42 × 1 = 30/42 - Subtract the two like fractions:
168/42 - 30/42 = 168 - 30/42 = 138/42 - After reducing the fraction, the answer is 23/7
- In mixed form: 32/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/3-30/42 12/3-60/42 12/6-30/42 12/3-30/84 36/3-30/42 12/3-90/42 12/9-30/42 60/3-30/42 12/15-30/42 84/3-30/42 12/21-30/42