-47.65% is the change from 340 to 178
Calculation steps:
[( 178 - 340 ) ÷ 340] x 100 = -47.65%
Formula
Percentage change = [(178 - 340) / 340] x 100
Subtract the new number by the original number
178 - 340 = -162
-162 ÷ 340 = -0.4764705882352941
-0.4764705882352941 x 100 = -47.65%