Subtract 10/21 from 6/30
6/30 - 10/21 is -29/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
6/30 = 6 × 7/30 × 7 = 42/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
10/21 = 10 × 10/21 × 10 = 100/210 - Subtract the two like fractions:
42/210 - 100/210 = 42 - 100/210 = -58/210 - After reducing the fraction, the answer is -29/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/30-10/21 6/30-20/21 6/60-10/21 6/30-10/42 18/30-10/21 6/30-30/21 6/90-10/21 6/30-10/63 6/30-50/21 42/30-10/21 6/30-70/21