-95.45% is the change from 330 to 15
Calculation steps:
[( 15 - 330 ) ÷ 330] x 100 = -95.45%
Formula
Percentage change = [(15 - 330) / 330] x 100
Subtract the new number by the original number
15 - 330 = -315
-315 ÷ 330 = -0.9545454545454546
-0.9545454545454546 x 100 = -95.45%