Subtract 45/54 from 30/7
1st number: 4 2/7, 2nd number: 45/54
30/7 - 45/54 is 145/42.
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,
30/7 = 30 × 54/7 × 54 = 1620/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
45/54 = 45 × 7/54 × 7 = 315/378 - Subtract the two like fractions:
1620/378 - 315/378 = 1620 - 315/378 = 1305/378 - After reducing the fraction, the answer is 145/42
- In mixed form: 319/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/7-45/54 30/7-90/54 30/14-45/54 90/7-45/54 30/21-45/54 30/35-45/54 30/49-45/54