-21.05% is the change from 513 to 405
Calculation steps:
[( 405 - 513 ) ÷ 513] x 100 = -21.05%
Formula
Percentage change = [(405 - 513) / 513] x 100
Subtract the new number by the original number
405 - 513 = -108
-108 ÷ 513 = -0.21052631578947367
-0.21052631578947367 x 100 = -21.05%