Subtract 12/3 from 30/72
1st number: 30/72, 2nd number: 4 0/3
30/72 - 12/3 is -43/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 3 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
30/72 = 30 × 1/72 × 1 = 30/72 - Likewise, for the 2nd fraction, since 3 × 24 = 72,
12/3 = 12 × 24/3 × 24 = 288/72 - Subtract the two like fractions:
30/72 - 288/72 = 30 - 288/72 = -258/72 - After reducing the fraction, the answer is -43/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/72-12/3 30/72-24/3 30/72-12/6 90/72-12/3 30/72-36/3 30/72-12/9 30/72-60/3 30/72-12/15 30/72-84/3 30/72-12/21