Two decimals that are equivalent to 0.9 are 0.90 and 0.900.
To understand this, it’s important to recognize that the value of a decimal can be extended by adding zeros to the end without changing its value. For example, 0.9 is the same as 0.90 because the additional zero does not increase the quantity. Similarly, 0.900 is also equivalent to 0.9, as it simply adds more decimal places without altering the value of the number. This concept helps in various mathematical calculations where precision is necessary.