Check if number's decimal is higher than .5 in JavaScript?

Question

How can I check if a number's decimal value is higher than .5 in JavaScript?

For example, I need to know if a number's decimal point is between .5 (higher) and .9 (equal or lower).

Some example numbers: 0.6, 2.7, 4.9.

Answer 1

var num = 5.7;

if((num % 1) > 0.5)
    console.write("remainder is greater than 0.5");

Answer 2

Round the number and check whether the result is larger than the number:

n < Math.round(n)

Math.round rounds the number up if the decimal part is .5 or higher.

Note: The result will be true if the decimal part of the number is >= .5, not just > .5.

To account for precision errors, you probably would also have to floor n:

Math.floor(n) < Math.round(n)