-44.38% is the change from 320 to 178
Calculation steps:
[( 178 - 320 ) ÷ 320] x 100 = -44.38%
Formula
Percentage change = [(178 - 320) / 320] x 100
Subtract the new number by the original number
178 - 320 = -142
-142 ÷ 320 = -0.44375
-0.44375 x 100 = -44.38%