-30.16% is the change from 945 to 660
Calculation steps:
[( 660 - 945 ) ÷ 945] x 100 = -30.16%
Formula
Percentage change = [(660 - 945) / 945] x 100
Subtract the new number by the original number
660 - 945 = -285
-285 ÷ 945 = -0.30158730158730157
-0.30158730158730157 x 100 = -30.16%