-56.61% is the change from 507 to 220
Calculation steps:
[( 220 - 507 ) ÷ 507] x 100 = -56.61%
Formula
Percentage change = [(220 - 507) / 507] x 100
Subtract the new number by the original number
220 - 507 = -287
-287 ÷ 507 = -0.5660749506903353
-0.5660749506903353 x 100 = -56.61%