Subtract 42/9 from 84/28
1st number: 3 0/28, 2nd number: 4 6/9
84/28 - 42/9 is -5/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 9 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 28 × 9 = 252,
84/28 = 84 × 9/28 × 9 = 756/252 - Likewise, for the 2nd fraction, since 9 × 28 = 252,
42/9 = 42 × 28/9 × 28 = 1176/252 - Subtract the two like fractions:
756/252 - 1176/252 = 756 - 1176/252 = -420/252 - After reducing the fraction, the answer is -5/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/28-84/9 84/56-42/9 84/28-42/18 84/28-42/27 84/28-42/45 84/28-42/63