Handle "Divide by zero error encountered error"

    SELECT   ((CASE WHEN (qid2.AgeBelow_16 - qid1.AgeBelow_16)= 0 THEN 1 ELSE (qid2.AgeBelow_16- qid1.AgeBelow_16) END )/ (CASE WHEN [qid1].AgeBelow_16= 0 THEN 1 ELSE [qid1].AgeBelow_16  END))*100 AS AgeBelow_16_Percent, 
    -- otherfields

    FROM
    -- whole query

I am using above query for calculating the percent difference from old value and new value. the main problem is there 0 if any field value 0 then throw "Divide by zero error encountered error" so I am using case when then else end. Is above implementation is good or can be write better then this please suggest me because it is more开发者_高级运维 confusion when fields are huge like above 10.

---

Something like this perhaps ?

declare @X int = 0
select 10 / isnull(nullif(@X, 0), 1)