-93.13% is the change from 320 to 22
Calculation steps:
[( 22 - 320 ) ÷ 320] x 100 = -93.13%
Formula
Percentage change = [(22 - 320) / 320] x 100
Subtract the new number by the original number
22 - 320 = -298
-298 ÷ 320 = -0.93125
-0.93125 x 100 = -93.13%