-21.27% is the change from 550 to 433
Calculation steps:
[( 433 - 550 ) ÷ 550] x 100 = -21.27%
Formula
Percentage change = [(433 - 550) / 550] x 100
Subtract the new number by the original number
433 - 550 = -117
-117 ÷ 550 = -0.21272727272727274
-0.21272727272727274 x 100 = -21.27%