-54.7% is the change from 521 to 236
Calculation steps:
[( 236 - 521 ) ÷ 521] x 100 = -54.7%
Formula
Percentage change = [(236 - 521) / 521] x 100
Subtract the new number by the original number
236 - 521 = -285
-285 ÷ 521 = -0.5470249520153551
-0.5470249520153551 x 100 = -54.7%