-3.91% is the change from 998 to 959
Calculation steps:
[( 959 - 998 ) ÷ 998] x 100 = -3.91%
Formula
Percentage change = [(959 - 998) / 998] x 100
Subtract the new number by the original number
959 - 998 = -39
-39 ÷ 998 = -0.03907815631262525
-0.03907815631262525 x 100 = -3.91%