-40.12% is the change from 987 to 591
Calculation steps:
[( 591 - 987 ) ÷ 987] x 100 = -40.12%
Formula
Percentage change = [(591 - 987) / 987] x 100
Subtract the new number by the original number
591 - 987 = -396
-396 ÷ 987 = -0.4012158054711246
-0.4012158054711246 x 100 = -40.12%