Subtract 84/24 from 7/42
1st number: 7/42, 2nd number: 3 12/24
7/42 - 84/24 is -10/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 42 × 4 = 168,
7/42 = 7 × 4/42 × 4 = 28/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
84/24 = 84 × 7/24 × 7 = 588/168 - Subtract the two like fractions:
28/168 - 588/168 = 28 - 588/168 = -560/168 - After reducing the fraction, the answer is -10/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/42-84/24 7/84-84/24 7/42-84/48 21/42-84/24 7/42-84/72 35/42-84/24 49/42-84/24