-5.61% is the change from 660 to 623
Calculation steps:
[( 623 - 660 ) ÷ 660] x 100 = -5.61%
Formula
Percentage change = [(623 - 660) / 660] x 100
Subtract the new number by the original number
623 - 660 = -37
-37 ÷ 660 = -0.05606060606060606
-0.05606060606060606 x 100 = -5.61%