Subtract 45/54 from 15/7
1st number: 2 1/7, 2nd number: 45/54
15/7 - 45/54 is 55/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 7 × 54 = 378,
15/7 = 15 × 54/7 × 54 = 810/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
45/54 = 45 × 7/54 × 7 = 315/378 - Subtract the two like fractions:
810/378 - 315/378 = 810 - 315/378 = 495/378 - After reducing the fraction, the answer is 55/42
- In mixed form: 113/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/7-45/54 15/7-90/54 15/14-45/54 45/7-45/54 15/21-45/54 75/7-45/54 15/35-45/54 15/49-45/54