-77.84% is the change from 993 to 220
Calculation steps:
[( 220 - 993 ) ÷ 993] x 100 = -77.84%
Formula
Percentage change = [(220 - 993) / 993] x 100
Subtract the new number by the original number
220 - 993 = -773
-773 ÷ 993 = -0.7784491440080564
-0.7784491440080564 x 100 = -77.84%