-91.94% is the change from 993 to 80
Calculation steps:
[( 80 - 993 ) ÷ 993] x 100 = -91.94%
Formula
Percentage change = [(80 - 993) / 993] x 100
Subtract the new number by the original number
80 - 993 = -913
-913 ÷ 993 = -0.919436052366566
-0.919436052366566 x 100 = -91.94%