hi there, my challenge on Data Modeling: Understanding custom and standard objects is only awarding me 100 points for the challenge out of 500. How do i fix this even though everything is right. The challenge colour on the topics pane is orange. 

Challenge Not yet complete... here's what's wrong:
There was an unexpected error in your org which is preventing this assessment check from completing: System.DmlException: Insert failed. First exception on row 0; first error: REQUIRED_FIELD_MISSING, Required fields are missing: [Discount_Percent__c]: [Discount_Percent__c]

Here is the thing I need to complete
Field-Level Security— 1.Customer SSN and Bank Account fields on contact records must be encrypted.
2. Any change in the Amount field on opportunity records must be recorded.
I have completed first part. Do I have to create a fromula field for on opportunity object ?
 

The challenge is:

You've been given a requirement to keep Contact addresses in sync with the Account they belong to. Use Process Builder to create a new process that updates all child Contact addresses when the address of the Account record is updated. This process:Can have any name.
Must be activated.
Must update Contact mailing address fields (Street, City, State, Post Code, Country) when the parent Account shipping address field values are updated.

I start with Accounts when records is created or edited.
Filter criteria where accounts shipping address (street, city, state, zip code) is changed (used "or" logic).

I am stuck on the next step "add action".  I started with action type "Update Records".
On objects, I can't seem to change Accounts to Contacts.  Why?