-78.5% is the change from 921 to 198
Calculation steps:
[( 198 - 921 ) ÷ 921] x 100 = -78.5%
Formula
Percentage change = [(198 - 921) / 921] x 100
Subtract the new number by the original number
198 - 921 = -723
-723 ÷ 921 = -0.7850162866449512
-0.7850162866449512 x 100 = -78.5%