Stones Aegis damage reduction: reduced by (2+SorcLvl)/4 or 2+(SorcLvl/4)?

@MarkSparklFarklStones Aegis damage reduction: reduced by (2+SorcLvl)/4 or 2+(SorcLvl/4)? The latter.

— Jeremy Crawford (@JeremyECrawford) February 6, 2017

@JeremyECrawford @MarkSparklFarkl Rounded Up or Down?

— Steven Connor (@Mazoshi1987) February 6, 2017

In D&D, you always round down, unless a rule says otherwise. Check out "Round Down" on page 7 of the Player's Handbook. #DnD https://t.co/RObXaaqOks

— Jeremy Crawford (@JeremyECrawford) February 6, 2017