Subtract 9/21 from 45/3
1st number: 15 0/3, 2nd number: 9/21
45/3 - 9/21 is 102/7.
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,
45/3 = 45 × 7/3 × 7 = 315/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
9/21 = 9 × 1/21 × 1 = 9/21 - Subtract the two like fractions:
315/21 - 9/21 = 315 - 9/21 = 306/21 - After reducing the fraction, the answer is 102/7
- In mixed form: 144/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/3-9/21 45/3-18/21 45/6-9/21 45/3-9/42 45/3-27/21 45/9-9/21 45/3-9/63 45/3-45/21 45/15-9/21 45/3-63/21 45/21-9/21