-49.11% is the change from 338 to 172
Calculation steps:
[( 172 - 338 ) ÷ 338] x 100 = -49.11%
Formula
Percentage change = [(172 - 338) / 338] x 100
Subtract the new number by the original number
172 - 338 = -166
-166 ÷ 338 = -0.4911242603550296
-0.4911242603550296 x 100 = -49.11%