Subtract 81/16 from 12/84
1st number: 12/84, 2nd number: 5 1/16
12/84 - 81/16 is -551/112.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 16 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 84 × 4 = 336,
12/84 = 12 × 4/84 × 4 = 48/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
81/16 = 81 × 21/16 × 21 = 1701/336 - Subtract the two like fractions:
48/336 - 1701/336 = 48 - 1701/336 = -1653/336 - After reducing the fraction, the answer is -551/112
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/84-81/16 12/84-81/32 36/84-81/16 12/84-81/48 60/84-81/16 12/84-81/80