Subtract 6/7 from 9/30
9/30 - 6/7 is -39/70.
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,
9/30 = 9 × 7/30 × 7 = 63/210 - Likewise, for the 2nd fraction, since 7 × 30 = 210,
6/7 = 6 × 30/7 × 30 = 180/210 - Subtract the two like fractions:
63/210 - 180/210 = 63 - 180/210 = -117/210 - After reducing the fraction, the answer is -39/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/30-6/7 9/30-12/7 9/60-6/7 9/30-6/14 27/30-6/7 9/30-18/7 9/90-6/7 9/30-6/21 45/30-6/7 9/30-30/7 9/30-6/35 63/30-6/7 9/30-42/7 9/30-6/49