-43.79% is the change from 306 to 172
Calculation steps:
[( 172 - 306 ) ÷ 306] x 100 = -43.79%
Formula
Percentage change = [(172 - 306) / 306] x 100
Subtract the new number by the original number
172 - 306 = -134
-134 ÷ 306 = -0.43790849673202614
-0.43790849673202614 x 100 = -43.79%