Subtract 30/9 from 70/12
1st number: 5 10/12, 2nd number: 3 3/9
70/12 - 30/9 is 5/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 9 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 12 × 3 = 36,
70/12 = 70 × 3/12 × 3 = 210/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
30/9 = 30 × 4/9 × 4 = 120/36 - Subtract the two like fractions:
210/36 - 120/36 = 210 - 120/36 = 90/36 - After reducing the fraction, the answer is 5/2
- In mixed form: 21/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/12-60/9 70/24-30/9 70/12-30/18 70/12-90/9 70/36-30/9 70/12-30/27 70/60-30/9 70/12-30/45 70/84-30/9 70/12-30/63