Subtract 27/7 from 45/3
1st number: 15 0/3, 2nd number: 3 6/7
45/3 - 27/7 is 78/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 7 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 7 × 3 = 21,
27/7 = 27 × 3/7 × 3 = 81/21 - Subtract the two like fractions:
315/21 - 81/21 = 315 - 81/21 = 234/21 - After reducing the fraction, the answer is 78/7
- In mixed form: 111/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/3-27/7 45/3-54/7 45/6-27/7 45/3-27/14 45/3-81/7 45/9-27/7 45/3-27/21 45/15-27/7 45/3-27/35 45/21-27/7 45/3-27/49