-60.31% is the change from 320 to 127
Calculation steps:
[( 127 - 320 ) ÷ 320] x 100 = -60.31%
Formula
Percentage change = [(127 - 320) / 320] x 100
Subtract the new number by the original number
127 - 320 = -193
-193 ÷ 320 = -0.603125
-0.603125 x 100 = -60.31%