-28.81% is the change from 302 to 215
Calculation steps:
[( 215 - 302 ) ÷ 302] x 100 = -28.81%
Formula
Percentage change = [(215 - 302) / 302] x 100
Subtract the new number by the original number
215 - 302 = -87
-87 ÷ 302 = -0.28807947019867547
-0.28807947019867547 x 100 = -28.81%