Subtract 70/7 from 12/30
1st number: 12/30, 2nd number: 10 0/7
12/30 - 70/7 is -48/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 7 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
12/30 = 12 × 7/30 × 7 = 84/210 - Likewise, for the 2nd fraction, since 7 × 30 = 210,
70/7 = 70 × 30/7 × 30 = 2100/210 - Subtract the two like fractions:
84/210 - 2100/210 = 84 - 2100/210 = -2016/210 - After reducing the fraction, the answer is -48/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/30-70/7 12/60-70/7 12/30-70/14 36/30-70/7 12/90-70/7 12/30-70/21 60/30-70/7 12/30-70/35 84/30-70/7 12/30-70/49