Subtract 50/21 from 30/3
1st number: 10 0/3, 2nd number: 2 8/21
30/3 - 50/21 is 160/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 21 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
30/3 = 30 × 7/3 × 7 = 210/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
50/21 = 50 × 1/21 × 1 = 50/21 - Subtract the two like fractions:
210/21 - 50/21 = 210 - 50/21 = 160/21 - In mixed form: 713/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/3-50/21 30/6-50/21 30/3-50/42 90/3-50/21 30/9-50/21 30/3-50/63 30/15-50/21 30/21-50/21