Subtract 30/7 from 8/4
1st number: 2 0/4, 2nd number: 4 2/7
8/4 - 30/7 is -16/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 7 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 4 × 7 = 28,
8/4 = 8 × 7/4 × 7 = 56/28 - Likewise, for the 2nd fraction, since 7 × 4 = 28,
30/7 = 30 × 4/7 × 4 = 120/28 - Subtract the two like fractions:
56/28 - 120/28 = 56 - 120/28 = -64/28 - After reducing the fraction, the answer is -16/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/4-30/7 8/4-60/7 8/4-30/14 24/4-30/7 8/4-90/7 8/12-30/7 8/4-30/21 40/4-30/7 8/20-30/7 8/4-30/35 56/4-30/7 8/28-30/7 8/4-30/49