-64.7% is the change from 609 to 215
Calculation steps:
[( 215 - 609 ) ÷ 609] x 100 = -64.7%
Formula
Percentage change = [(215 - 609) / 609] x 100
Subtract the new number by the original number
215 - 609 = -394
-394 ÷ 609 = -0.6469622331691297
-0.6469622331691297 x 100 = -64.7%