-57.09% is the change from 501 to 215
Calculation steps:
[( 215 - 501 ) ÷ 501] x 100 = -57.09%
Formula
Percentage change = [(215 - 501) / 501] x 100
Subtract the new number by the original number
215 - 501 = -286
-286 ÷ 501 = -0.5708582834331337
-0.5708582834331337 x 100 = -57.09%