Subtract 27/21 from 8/30
1st number: 8/30, 2nd number: 1 6/21
8/30 - 27/21 is -107/105.
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,
8/30 = 8 × 7/30 × 7 = 56/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
27/21 = 27 × 10/21 × 10 = 270/210 - Subtract the two like fractions:
56/210 - 270/210 = 56 - 270/210 = -214/210 - After reducing the fraction, the answer is -107/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/30-27/21 8/30-54/21 8/60-27/21 8/30-27/42 24/30-27/21 8/30-81/21 8/90-27/21 8/30-27/63 40/30-27/21 56/30-27/21