Subtract 36/8 from 12/84, Solve 12/84

Subtract 36/8 from 12/84

1^st number: 12/84, 2^nd number: 4 4/8

12/84 - 36/8 is -61/14.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 8 is 168

Next, find the equivalent fraction of both fractional numbers with denominator 168
For the 1st fraction, since 84 × 2 = 168,
12/84 = 12 × 2/84 × 2 = 24/168
Likewise, for the 2nd fraction, since 8 × 21 = 168,
36/8 = 36 × 21/8 × 21 = 756/168
Subtract the two like fractions:
24/168 - 756/168 = 24 - 756/168 = -732/168
After reducing the fraction, the answer is -61/14

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad