Solutions by everydaycalculation.com

12 - 23 is -16.

- Find the least common denominator or LCM of the two denominators:

LCM of 2 and 3 is**6**

Next, find the equivalent fraction of both fractional numbers with denominator 6 - For the 1st fraction, since 2 × 3 = 6,

12 = 1 × 32 × 3 = 36 - Likewise, for the 2nd fraction, since 3 × 2 = 6,

23 = 2 × 23 × 2 = 46 - Subtract the two like fractions:

36 - 46 = 3 - 46 = -16

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