Subtract 81/36 from 7/84
1st number: 7/84, 2nd number: 2 9/36
7/84 - 81/36 is -13/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
7/84 = 7 × 3/84 × 3 = 21/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
81/36 = 81 × 7/36 × 7 = 567/252 - Subtract the two like fractions:
21/252 - 567/252 = 21 - 567/252 = -546/252 - After reducing the fraction, the answer is -13/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/84-81/36 7/84-81/72 21/84-81/36 35/84-81/36 49/84-81/36