-4.85% is the change from 660 to 628
Calculation steps:
[( 628 - 660 ) ÷ 660] x 100 = -4.85%
Formula
Percentage change = [(628 - 660) / 660] x 100
Subtract the new number by the original number
628 - 660 = -32
-32 ÷ 660 = -0.048484848484848485
-0.048484848484848485 x 100 = -4.85%