If your case status has changed from "decision is pending" to "Decision is mailed," check the paragraph that mentions how many days your case is pending. There's a sentence states "and the USCIS portion of the EAD clock is currently running" then you will receive "Notice of intent to deny" and your case has been transferred to immigrantion judge. But if There's a sentence states "and the USCIS portion of the EAD clock is currently stopped" then your case has been approved.
Also, if your status changed from "decision is pending" to "fees were waived" then it is approval.