Subtract 72/9 from 4/84
1st number: 4/84, 2nd number: 8 0/9
4/84 - 72/9 is -167/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 9 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
4/84 = 4 × 3/84 × 3 = 12/252 - Likewise, for the 2nd fraction, since 9 × 28 = 252,
72/9 = 72 × 28/9 × 28 = 2016/252 - Subtract the two like fractions:
12/252 - 2016/252 = 12 - 2016/252 = -2004/252 - After reducing the fraction, the answer is -167/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/84-72/9 4/84-72/18 12/84-72/9 4/84-72/27 20/84-72/9 4/84-72/45 28/84-72/9 4/84-72/63