-15.51% is the change from 993 to 839
Calculation steps:
[( 839 - 993 ) ÷ 993] x 100 = -15.51%
Formula
Percentage change = [(839 - 993) / 993] x 100
Subtract the new number by the original number
839 - 993 = -154
-154 ÷ 993 = -0.15508559919436052
-0.15508559919436052 x 100 = -15.51%