Subtract 12/7 from 9/84
1st number: 9/84, 2nd number: 1 5/7
9/84 - 12/7 is -45/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 7 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
9/84 = 9 × 1/84 × 1 = 9/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
12/7 = 12 × 12/7 × 12 = 144/84 - Subtract the two like fractions:
9/84 - 144/84 = 9 - 144/84 = -135/84 - After reducing the fraction, the answer is -45/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/84-12/7 9/84-24/7 9/84-12/14 27/84-12/7 9/84-36/7 9/84-12/21 45/84-12/7 9/84-60/7 9/84-12/35 63/84-12/7 9/84-84/7 9/84-12/49