Calculation In Select Statement

I am trying to do a calculation where I show the [YesEmail] / [TotalCustomers]. It wont let me do it unless i do two queries. Is there a way to put this all in this select statment.


Code:



SELECT customer_lifetime_totals.occurrence_1_store_no as [StoreNo],
COUNT( case when customer.email_address IS NULL then 1 end) as [NoEmail],
COUNT( case when customer.email_address IS NOT NULL then 1 end) as [YesEmail],
COUNT(customer.customer_no) AS [TotalNewCustomers]


FROM customer_lifetime_totals INNER JOIN
customer ON customer_lifetime_totals.customer_id = customer.customer_id
WHERE (occurrence_1_transaction_date > CONVERT(DATETIME, '2006-08-01 00:00:00', 102))
GROUP BY customer_lifetime_totals.occurrence_1_store_no
ORDER BY customer_lifetime_totals.occurrence_1_store_no






This works ... but only when i put the previous query in a temp table and then run another query referring to it.

Code:


cast(100*(cast(YesEmail as float) / TotalNewCustomers) as numeric (5,2)) as [Percent]