-51.68% is the change from 921 to 445
Calculation steps:
[( 445 - 921 ) ÷ 921] x 100 = -51.68%
Formula
Percentage change = [(445 - 921) / 921] x 100
Subtract the new number by the original number
445 - 921 = -476
-476 ÷ 921 = -0.5168295331161781
-0.5168295331161781 x 100 = -51.68%