-23.94% is the change from 330 to 251
Calculation steps:
[( 251 - 330 ) ÷ 330] x 100 = -23.94%
Formula
Percentage change = [(251 - 330) / 330] x 100
Subtract the new number by the original number
251 - 330 = -79
-79 ÷ 330 = -0.23939393939393938
-0.23939393939393938 x 100 = -23.94%