-0.3% is the change from 660 to 658
Calculation steps:
[( 658 - 660 ) ÷ 660] x 100 = -0.3%
Formula
Percentage change = [(658 - 660) / 660] x 100
Subtract the new number by the original number
658 - 660 = -2
-2 ÷ 660 = -0.0030303030303030303
-0.0030303030303030303 x 100 = -0.3%