-14.01% is the change from 521 to 448
Calculation steps:
[( 448 - 521 ) ÷ 521] x 100 = -14.01%
Formula
Percentage change = [(448 - 521) / 521] x 100
Subtract the new number by the original number
448 - 521 = -73
-73 ÷ 521 = -0.1401151631477927
-0.1401151631477927 x 100 = -14.01%