-13.05% is the change from 521 to 453
Calculation steps:
[( 453 - 521 ) ÷ 521] x 100 = -13.05%
Formula
Percentage change = [(453 - 521) / 521] x 100
Subtract the new number by the original number
453 - 521 = -68
-68 ÷ 521 = -0.13051823416506717
-0.13051823416506717 x 100 = -13.05%