Subtract 2/21 from 8/30
8/30 - 2/21 is 6/35.
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,
2/21 = 2 × 10/21 × 10 = 20/210 - Subtract the two like fractions:
56/210 - 20/210 = 56 - 20/210 = 36/210 - After reducing the fraction, the answer is 6/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/30-2/21 8/30-4/21 8/60-2/21 8/30-2/42 24/30-2/21 8/30-6/21 8/90-2/21 8/30-2/63 40/30-2/21 8/30-10/21 56/30-2/21 8/30-14/21