-56.05% is the change from 521 to 229
Calculation steps:
[( 229 - 521 ) ÷ 521] x 100 = -56.05%
Formula
Percentage change = [(229 - 521) / 521] x 100
Subtract the new number by the original number
229 - 521 = -292
-292 ÷ 521 = -0.5604606525911708
-0.5604606525911708 x 100 = -56.05%