-98.44% is the change from 320 to 5
Calculation steps:
[( 5 - 320 ) ÷ 320] x 100 = -98.44%
Formula
Percentage change = [(5 - 320) / 320] x 100
Subtract the new number by the original number
5 - 320 = -315
-315 ÷ 320 = -0.984375
-0.984375 x 100 = -98.44%