-1.79% is the change from 670 to 658
Calculation steps:
[( 658 - 670 ) ÷ 670] x 100 = -1.79%
Formula
Percentage change = [(658 - 670) / 670] x 100
Subtract the new number by the original number
658 - 670 = -12
-12 ÷ 670 = -0.01791044776119403
-0.01791044776119403 x 100 = -1.79%