Subtract 10/30 from 16/21
16/21 - 10/30 is 3/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
16/21 = 16 × 10/21 × 10 = 160/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
10/30 = 10 × 7/30 × 7 = 70/210 - Subtract the two like fractions:
160/210 - 70/210 = 160 - 70/210 = 90/210 - After reducing the fraction, the answer is 3/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/21-10/30 16/21-20/30 16/42-10/30 16/21-10/60 48/21-10/30 16/63-10/30 16/21-10/90 80/21-10/30 16/21-50/30 16/21-70/30