-39.51% is the change from 987 to 597
Calculation steps:
[( 597 - 987 ) ÷ 987] x 100 = -39.51%
Formula
Percentage change = [(597 - 987) / 987] x 100
Subtract the new number by the original number
597 - 987 = -390
-390 ÷ 987 = -0.3951367781155015
-0.3951367781155015 x 100 = -39.51%