Subtract 56/12 from 30/70
1st number: 30/70, 2nd number: 4 8/12
30/70 - 56/12 is -89/21.
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,
56/12 = 56 × 35/12 × 35 = 1960/420 - Subtract the two like fractions:
180/420 - 1960/420 = 180 - 1960/420 = -1780/420 - After reducing the fraction, the answer is -89/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/70-56/12 30/70-56/24 90/70-56/12 30/70-56/36 30/70-56/60 30/70-56/84