-47.27% is the change from 550 to 290
Calculation steps:
[( 290 - 550 ) ÷ 550] x 100 = -47.27%
Formula
Percentage change = [(290 - 550) / 550] x 100
Subtract the new number by the original number
290 - 550 = -260
-260 ÷ 550 = -0.4727272727272727
-0.4727272727272727 x 100 = -47.27%