Subtract 8/18 from 30/7
1st number: 4 2/7, 2nd number: 8/18
30/7 - 8/18 is 242/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 7 × 18 = 126,
30/7 = 30 × 18/7 × 18 = 540/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
8/18 = 8 × 7/18 × 7 = 56/126 - Subtract the two like fractions:
540/126 - 56/126 = 540 - 56/126 = 484/126 - After reducing the fraction, the answer is 242/63
- In mixed form: 353/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/7-8/18 30/7-16/18 30/14-8/18 30/7-8/36 90/7-8/18 30/7-24/18 30/21-8/18 30/7-8/54 30/7-40/18 30/35-8/18 30/7-8/90 30/7-56/18 30/49-8/18