-75.05% is the change from 521 to 130
Calculation steps:
[( 130 - 521 ) ÷ 521] x 100 = -75.05%
Formula
Percentage change = [(130 - 521) / 521] x 100
Subtract the new number by the original number
130 - 521 = -391
-391 ÷ 521 = -0.7504798464491362
-0.7504798464491362 x 100 = -75.05%