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None, the total sum of angles in a rhombus is 360 degrees but none of them are right angles.
A rhombus has no right angles at its vertices but its diagonals are perpendicular to each other forming 4 right angles.
A rhombus doesn't need any right angles to be a rhombus, although it can have them if it wants to. If a rhombus has right angles, then it's a square. And if it has one right angle, then it must have four of them.
A rhombus will either have four right angles, or two acute angles and two obtuse angles.
The opposite angles of a rhombus are congruent so there must be at least two pair of same sized angles. Since a square is a rhombus, we could have all 4 angles of equal size too.