-45.05% is the change from 666 to 366
Calculation steps:
[( 366 - 666 ) ÷ 666] x 100 = -45.05%
Formula
Percentage change = [(366 - 666) / 666] x 100
Subtract the new number by the original number
366 - 666 = -300
-300 ÷ 666 = -0.45045045045045046
-0.45045045045045046 x 100 = -45.05%