-10.57% is the change from 918 to 821
Calculation steps:
[( 821 - 918 ) ÷ 918] x 100 = -10.57%
Formula
Percentage change = [(821 - 918) / 918] x 100
Subtract the new number by the original number
821 - 918 = -97
-97 ÷ 918 = -0.1056644880174292
-0.1056644880174292 x 100 = -10.57%