Given,
57,116 people under the age of 14 years old
221,290 people age between 15 and 64 years old
43,503 people over the age of 65 years old
We can calculate the child depency ratio as,
people under the age of 14 years old / people age between 15 and 64 years old
Therefore,
rounded to the Thousandths place, 0.258
The total age dependency ratio can be calculated as,
( people under the age of 14 years old + people over the age of 65 years old ) / people age between 15 and 64 years old
Therefore,
rounding, 0.455