Subtract 20/21 from 50/6
1st number: 8 2/6, 2nd number: 20/21
50/6 - 20/21 is 155/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
50/6 = 50 × 7/6 × 7 = 350/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
20/21 = 20 × 2/21 × 2 = 40/42 - Subtract the two like fractions:
350/42 - 40/42 = 350 - 40/42 = 310/42 - After reducing the fraction, the answer is 155/21
- In mixed form: 78/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/6-40/21 50/12-20/21 50/6-20/42 50/6-60/21 50/18-20/21 50/6-20/63 50/30-20/21 50/42-20/21