-83.38% is the change from 993 to 165
Calculation steps:
[( 165 - 993 ) ÷ 993] x 100 = -83.38%
Formula
Percentage change = [(165 - 993) / 993] x 100
Subtract the new number by the original number
165 - 993 = -828
-828 ÷ 993 = -0.8338368580060423
-0.8338368580060423 x 100 = -83.38%