Subtract 8/7 from 30/54
1st number: 30/54, 2nd number: 1 1/7
30/54 - 8/7 is -37/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 7 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
30/54 = 30 × 7/54 × 7 = 210/378 - Likewise, for the 2nd fraction, since 7 × 54 = 378,
8/7 = 8 × 54/7 × 54 = 432/378 - Subtract the two like fractions:
210/378 - 432/378 = 210 - 432/378 = -222/378 - After reducing the fraction, the answer is -37/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/54-8/7 30/54-16/7 30/54-8/14 90/54-8/7 30/54-24/7 30/54-8/21 30/54-40/7 30/54-8/35 30/54-56/7 30/54-8/49