-55.31% is the change from 320 to 143
Calculation steps:
[( 143 - 320 ) ÷ 320] x 100 = -55.31%
Formula
Percentage change = [(143 - 320) / 320] x 100
Subtract the new number by the original number
143 - 320 = -177
-177 ÷ 320 = -0.553125
-0.553125 x 100 = -55.31%