Subtract 5/21 from 20/10
1st number: 2 0/10, 2nd number: 5/21
20/10 - 5/21 is 37/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
20/10 = 20 × 21/10 × 21 = 420/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
5/21 = 5 × 10/21 × 10 = 50/210 - Subtract the two like fractions:
420/210 - 50/210 = 420 - 50/210 = 370/210 - After reducing the fraction, the answer is 37/21
- In mixed form: 116/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/10-5/21 20/10-10/21 20/10-5/42 60/10-5/21 20/10-15/21 20/30-5/21 20/10-5/63 20/10-25/21 20/50-5/21 20/10-35/21 20/70-5/21