Subtract 3/21 from 20/2
1st number: 10 0/2, 2nd number: 3/21
20/2 - 3/21 is 69/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
20/2 = 20 × 21/2 × 21 = 420/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
3/21 = 3 × 2/21 × 2 = 6/42 - Subtract the two like fractions:
420/42 - 6/42 = 420 - 6/42 = 414/42 - After reducing the fraction, the answer is 69/7
- In mixed form: 96/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/2-3/21 20/2-6/21 20/4-3/21 20/2-3/42 60/2-3/21 20/2-9/21 20/6-3/21 20/2-3/63 20/2-15/21 20/10-3/21 20/14-3/21