-1.05% is the change from 667 to 660
Calculation steps:
[( 660 - 667 ) ÷ 667] x 100 = -1.05%
Formula
Percentage change = [(660 - 667) / 667] x 100
Subtract the new number by the original number
660 - 667 = -7
-7 ÷ 667 = -0.010494752623688156
-0.010494752623688156 x 100 = -1.05%