Subtract 24/12 from 30/70
1st number: 30/70, 2nd number: 2 0/12
30/70 - 24/12 is -11/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 12 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
30/70 = 30 × 6/70 × 6 = 180/420 - Likewise, for the 2nd fraction, since 12 × 35 = 420,
24/12 = 24 × 35/12 × 35 = 840/420 - Subtract the two like fractions:
180/420 - 840/420 = 180 - 840/420 = -660/420 - After reducing the fraction, the answer is -11/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/70-24/12 30/70-48/12 90/70-24/12 30/70-72/12 30/70-24/36 30/70-24/60 30/70-24/84