-17.62% is the change from 210 to 173
Calculation steps:
[( 173 - 210 ) ÷ 210] x 100 = -17.62%
Formula
Percentage change = [(173 - 210) / 210] x 100
Subtract the new number by the original number
173 - 210 = -37
-37 ÷ 210 = -0.1761904761904762
-0.1761904761904762 x 100 = -17.62%