-53.13% is the change from 399 to 187
Calculation steps:
[( 187 - 399 ) ÷ 399] x 100 = -53.13%
Formula
Percentage change = [(187 - 399) / 399] x 100
Subtract the new number by the original number
187 - 399 = -212
-212 ÷ 399 = -0.531328320802005
-0.531328320802005 x 100 = -53.13%