Subtract 30/70 from 72/12
1st number: 6 0/12, 2nd number: 30/70
72/12 - 30/70 is 39/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 70 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 12 × 35 = 420,
72/12 = 72 × 35/12 × 35 = 2520/420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,
30/70 = 30 × 6/70 × 6 = 180/420 - Subtract the two like fractions:
2520/420 - 180/420 = 2520 - 180/420 = 2340/420 - After reducing the fraction, the answer is 39/7
- In mixed form: 54/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/12-60/70 72/24-30/70 72/12-90/70 72/36-30/70 72/60-30/70 72/84-30/70