-30.94% is the change from 307 to 212
Calculation steps:
[( 212 - 307 ) ÷ 307] x 100 = -30.94%
Formula
Percentage change = [(212 - 307) / 307] x 100
Subtract the new number by the original number
212 - 307 = -95
-95 ÷ 307 = -0.30944625407166126
-0.30944625407166126 x 100 = -30.94%