45.05% is the change from 666 to 966
Calculation steps:
[( 966 - 666 ) ÷ 666] x 100 = 45.05%
Formula
Percentage change = [(966 - 666) / 666] x 100
Subtract the new number by the original number
966 - 666 = 300
300 ÷ 666 = 0.45045045045045046
0.45045045045045046 x 100 = 45.05%