-1.99% is the change from 955 to 936
Calculation steps:
[( 936 - 955 ) ÷ 955] x 100 = -1.99%
Formula
Percentage change = [(936 - 955) / 955] x 100
Subtract the new number by the original number
936 - 955 = -19
-19 ÷ 955 = -0.019895287958115182
-0.019895287958115182 x 100 = -1.99%