-24.44% is the change from 671 to 507
Calculation steps:
[( 507 - 671 ) ÷ 671] x 100 = -24.44%
Formula
Percentage change = [(507 - 671) / 671] x 100
Subtract the new number by the original number
507 - 671 = -164
-164 ÷ 671 = -0.2444113263785395
-0.2444113263785395 x 100 = -24.44%