-57.59% is the change from 507 to 215
Calculation steps:
[( 215 - 507 ) ÷ 507] x 100 = -57.59%
Formula
Percentage change = [(215 - 507) / 507] x 100
Subtract the new number by the original number
215 - 507 = -292
-292 ÷ 507 = -0.5759368836291914
-0.5759368836291914 x 100 = -57.59%