-4.01% is the change from 998 to 958
Calculation steps:
[( 958 - 998 ) ÷ 998] x 100 = -4.01%
Formula
Percentage change = [(958 - 998) / 998] x 100
Subtract the new number by the original number
958 - 998 = -40
-40 ÷ 998 = -0.04008016032064128
-0.04008016032064128 x 100 = -4.01%