What is 3.6 :1.8 in simplest form

Question

and how did you get it.

Answer 1

The simplest form is 3.6 : 1.8

Note: If we multiply or divide both parts of a ratio by the same non-zero number, we obtain
an equal ratio.

Divide each part by 1.8.

Therefore, the simplest form is 2 : 1.