-39.62% is the change from 318 to 192
Calculation steps:
[( 192 - 318 ) ÷ 318] x 100 = -39.62%
Formula
Percentage change = [(192 - 318) / 318] x 100
Subtract the new number by the original number
192 - 318 = -126
-126 ÷ 318 = -0.39622641509433965
-0.39622641509433965 x 100 = -39.62%