-25.04% is the change from 671 to 503
Calculation steps:
[( 503 - 671 ) ÷ 671] x 100 = -25.04%
Formula
Percentage change = [(503 - 671) / 671] x 100
Subtract the new number by the original number
503 - 671 = -168
-168 ÷ 671 = -0.2503725782414307
-0.2503725782414307 x 100 = -25.04%