-63.62% is the change from 591 to 215
Calculation steps:
[( 215 - 591 ) ÷ 591] x 100 = -63.62%
Formula
Percentage change = [(215 - 591) / 591] x 100
Subtract the new number by the original number
215 - 591 = -376
-376 ÷ 591 = -0.6362098138747885
-0.6362098138747885 x 100 = -63.62%