-50% is the change from 334 to 167
Calculation steps:
[( 167 - 334 ) ÷ 334] x 100 = -50%
Formula
Percentage change = [(167 - 334) / 334] x 100
Subtract the new number by the original number
167 - 334 = -167
-167 ÷ 334 = -0.5
-0.5 x 100 = -50%
Example