This situation must be a coprime number.

According to the meaning of the simplest integer ratio, that is, the simplest integer ratio means that the first term of the ratio and the last term of the ratio are a set of coprime numbers. Coprime numbers are a concept in mathematics that refer to two or more non-zero natural numbers whose common factor is only 1, and two non-zero natural numbers whose common factor is only 1.

The simplest ratio is a simplified form of ratio. The first and last terms of a ratio are the ratio of coprime numbers, which is called the simplest integer ratio, or the simplest ratio for short.