-40.89% is the change from 993 to 587
Calculation steps:
[( 587 - 993 ) ÷ 993] x 100 = -40.89%
Formula
Percentage change = [(587 - 993) / 993] x 100
Subtract the new number by the original number
587 - 993 = -406
-406 ÷ 993 = -0.40886203423967776
-0.40886203423967776 x 100 = -40.89%