-23.1% is the change from 671 to 516
Calculation steps:
[( 516 - 671 ) ÷ 671] x 100 = -23.1%
Formula
Percentage change = [(516 - 671) / 671] x 100
Subtract the new number by the original number
516 - 671 = -155
-155 ÷ 671 = -0.23099850968703428
-0.23099850968703428 x 100 = -23.1%