-49.4% is the change from 336 to 170
Calculation steps:
[( 170 - 336 ) ÷ 336] x 100 = -49.4%
Formula
Percentage change = [(170 - 336) / 336] x 100
Subtract the new number by the original number
170 - 336 = -166
-166 ÷ 336 = -0.49404761904761907
-0.49404761904761907 x 100 = -49.4%