A concert hall has 1540 seats. Calculate the number of people in the hall when 55% of the seats are occupied

If 55% of the 1540 seats were filled there would be 847 occupied seats.

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .