-43.46% is the change from 306 to 173
Calculation steps:
[( 173 - 306 ) ÷ 306] x 100 = -43.46%
Formula
Percentage change = [(173 - 306) / 306] x 100
Subtract the new number by the original number
173 - 306 = -133
-133 ÷ 306 = -0.434640522875817
-0.434640522875817 x 100 = -43.46%