It is one of two kinds of unit ratios (the other has numerator = 1).
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cross product
The denominator of 12 is 1.
It does not change. If the numerator changes then, unless the denominator changes in the same proportion, the fraction is no longer the same.
Direct Proportion means that as one increases, the other also increases.Inverse proportion is the reciprocal of direct proportion. If something is in the direct proportion of 1:3, then the inversion proportion is 3:1.OrIndirect Proportion means that as one increases the other decreases, or one is directly proportional to 1 divided by the other. Example: Pressure is indirectly proportional to volume, or Pressure is directly proportional to 1/Volume.
It is: 4 to 1