Subtract 30/70 from 12/7
1st number: 1 5/7, 2nd number: 30/70
12/7 - 30/70 is 9/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 70 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 7 × 10 = 70,
12/7 = 12 × 10/7 × 10 = 120/70 - Likewise, for the 2nd fraction, since 70 × 1 = 70,
30/70 = 30 × 1/70 × 1 = 30/70 - Subtract the two like fractions:
120/70 - 30/70 = 120 - 30/70 = 90/70 - After reducing the fraction, the answer is 9/7
- In mixed form: 12/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/7-30/70 12/7-60/70 12/14-30/70 36/7-30/70 12/7-90/70 12/21-30/70 60/7-30/70 12/35-30/70 84/7-30/70 12/49-30/70