-49.7% is the change from 338 to 170
Calculation steps:
[( 170 - 338 ) ÷ 338] x 100 = -49.7%
Formula
Percentage change = [(170 - 338) / 338] x 100
Subtract the new number by the original number
170 - 338 = -168
-168 ÷ 338 = -0.4970414201183432
-0.4970414201183432 x 100 = -49.7%