Subtract 84/96 from 30/42
30/42 - 84/96 is -9/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 96 is 672
Next, find the equivalent fraction of both fractional numbers with denominator 672 - For the 1st fraction, since 42 × 16 = 672,
30/42 = 30 × 16/42 × 16 = 480/672 - Likewise, for the 2nd fraction, since 96 × 7 = 672,
84/96 = 84 × 7/96 × 7 = 588/672 - Subtract the two like fractions:
480/672 - 588/672 = 480 - 588/672 = -108/672 - After reducing the fraction, the answer is -9/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/42-84/96 30/84-84/96 90/42-84/96