-21.76% is the change from 671 to 525
Calculation steps:
[( 525 - 671 ) ÷ 671] x 100 = -21.76%
Formula
Percentage change = [(525 - 671) / 671] x 100
Subtract the new number by the original number
525 - 671 = -146
-146 ÷ 671 = -0.21758569299552907
-0.21758569299552907 x 100 = -21.76%