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Somnath SharmaSomnath Sharma 

Formulas & Validations Using Formula Fields

I am trying to complete the above challenge on 
Formulas & ValidationsUsing Formula Fields  but it says Challenge not yet complete... here's what's wrong: 
The 'Days_Since_Last_Update__c' does not exist which actually exists .I have created this field for a account.
Somnath SharmaSomnath Sharma
 Create a formula field that determines the number of days between today and the last activity date for a case's account.

what does the last word means(for a cases Account)

I hope it means for any account just create a formula field.
William TranWilliam Tran
Try checking the spelling and the type to make sure it is exactly as requested.

Otherwise, please post a screen print of what you created.

Thx
Somnath SharmaSomnath Sharma
User-added image
Somnath SharmaSomnath Sharma
hi wiilliam this is what i have created.
Somnath SharmaSomnath Sharma
User-added image
Somnath SharmaSomnath Sharma
Found a Solution Actually it should have been on CASE OBJECTUser-added image
William TranWilliam Tran
Somnath:

The formula should be on the Case object. --> FAILED since you created on the account object
The formula should be of return type Number. --> Okay
The formula should be named 'Days Since Last Update' and have a resulting API Name of 'Days_Since_Last_Update__c'.

Could fail since the label should be : 'Days Since Last Update' not 'Days_Since_Last_Update'

The formula should return the number of days between the account’s Last Activity Date and today.

For formula use: Today() -  Account.LastActivityDate

As a common practice, if your question is answered, please choose 1 best answer. 
But you can give every answer a thumb up if that answer is helpful to you. 

Thanks