Subtract 3/21 from 54/3
1st number: 18 0/3, 2nd number: 3/21
54/3 - 3/21 is 125/7.
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,
54/3 = 54 × 7/3 × 7 = 378/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
3/21 = 3 × 1/21 × 1 = 3/21 - Subtract the two like fractions:
378/21 - 3/21 = 378 - 3/21 = 375/21 - After reducing the fraction, the answer is 125/7
- In mixed form: 176/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/3-6/21 54/6-3/21 54/3-3/42 54/3-9/21 54/9-3/21 54/3-3/63 54/3-15/21 54/15-3/21 54/21-3/21