Subtract 45/7 from 30/12
1st number: 2 6/12, 2nd number: 6 3/7
30/12 - 45/7 is -55/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 7 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
30/12 = 30 × 7/12 × 7 = 210/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
45/7 = 45 × 12/7 × 12 = 540/84 - Subtract the two like fractions:
210/84 - 540/84 = 210 - 540/84 = -330/84 - After reducing the fraction, the answer is -55/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/12-45/7 30/12-90/7 30/24-45/7 30/12-45/14 90/12-45/7 30/36-45/7 30/12-45/21 30/60-45/7 30/12-45/35 30/84-45/7 30/12-45/49