-88.1% is the change from 336 to 40
Calculation steps:
[( 40 - 336 ) ÷ 336] x 100 = -88.1%
Formula
Percentage change = [(40 - 336) / 336] x 100
Subtract the new number by the original number
40 - 336 = -296
-296 ÷ 336 = -0.8809523809523809
-0.8809523809523809 x 100 = -88.1%