-95.95% is the change from 321 to 13
Calculation steps:
[( 13 - 321 ) ÷ 321] x 100 = -95.95%
Formula
Percentage change = [(13 - 321) / 321] x 100
Subtract the new number by the original number
13 - 321 = -308
-308 ÷ 321 = -0.9595015576323987
-0.9595015576323987 x 100 = -95.95%