Subtract 30/4 from 8/42
1st number: 8/42, 2nd number: 7 2/4
8/42 - 30/4 is -307/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
8/42 = 8 × 2/42 × 2 = 16/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
30/4 = 30 × 21/4 × 21 = 630/84 - Subtract the two like fractions:
16/84 - 630/84 = 16 - 630/84 = -614/84 - After reducing the fraction, the answer is -307/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/42-30/4 8/42-60/4 8/84-30/4 8/42-30/8 24/42-30/4 8/42-90/4 8/42-30/12 40/42-30/4 8/42-30/20 56/42-30/4 8/42-30/28