H(x) = 17 + x/6 h(-18) =
x/6 is a fraction

Simply plug in the value for x.

If x is equal to -18, then plug in -18 for x.

Example:

f(x) = 15 + x/5. 
f(5) = 15 + 5/5.

Then solve the equation.

A function is just something that receives some value and then barfs a value out. This is an IO relationship. (Input/Output).

Fraction into a decimal- just divide the top of the fraction by the bottom

Decimal into Precent- multiply by 100 then move the decimal 2 places to the right