-94.7% is the change from 321 to 17
Calculation steps:
[( 17 - 321 ) ÷ 321] x 100 = -94.7%
Formula
Percentage change = [(17 - 321) / 321] x 100
Subtract the new number by the original number
17 - 321 = -304
-304 ÷ 321 = -0.9470404984423676
-0.9470404984423676 x 100 = -94.7%