For example, 2: 5 is equivalent to 2 divided by 5=0.4, which is equivalent to 2/5 (2/5).
The ratio is to divide the number before the ratio by the number after it, which is the division arithmetic. Fraction can actually be understood as a division formula, but it is only expressed in the form of fraction. Say 2/5.
The fractional form is 2/5, and the specific value is 2 divided by 5 =0.4.
Simplifying the ratio is reduction, for example, 4 to 6 is 4/6, which can be simplified (reduced) to 2 to 3 is 2/3.
Generally, the ratio is integer or decimal, while the simplified ratio (reduced fraction) only minimizes the two ratios (numerator denominator), that is, reduces the numerator denominator to the smallest integer.
In fact, to put it bluntly, x is greater than x, x is divided by x, and x is the same meaning, but the expression is different. There are no special requirements, which can be completely understood as one thing and can be used universally. If there are special requirements on which form to use, specific separation is also possible.