-18.01% is the change from 211 to 173
Calculation steps:
[( 173 - 211 ) ÷ 211] x 100 = -18.01%
Formula
Percentage change = [(173 - 211) / 211] x 100
Subtract the new number by the original number
173 - 211 = -38
-38 ÷ 211 = -0.18009478672985782
-0.18009478672985782 x 100 = -18.01%