-95% is the change from 320 to 16
Calculation steps:
[( 16 - 320 ) ÷ 320] x 100 = -95%
Formula
Percentage change = [(16 - 320) / 320] x 100
Subtract the new number by the original number
16 - 320 = -304
-304 ÷ 320 = -0.95
-0.95 x 100 = -95%
Example