-52.05% is the change from 390 to 187
Calculation steps:
[( 187 - 390 ) ÷ 390] x 100 = -52.05%
Formula
Percentage change = [(187 - 390) / 390] x 100
Subtract the new number by the original number
187 - 390 = -203
-203 ÷ 390 = -0.5205128205128206
-0.5205128205128206 x 100 = -52.05%