-26.49% is the change from 521 to 383
Calculation steps:
[( 383 - 521 ) ÷ 521] x 100 = -26.49%
Formula
Percentage change = [(383 - 521) / 521] x 100
Subtract the new number by the original number
383 - 521 = -138
-138 ÷ 521 = -0.2648752399232246
-0.2648752399232246 x 100 = -26.49%