-18.4% is the change from 212 to 173
Calculation steps:
[( 173 - 212 ) ÷ 212] x 100 = -18.4%
Formula
Percentage change = [(173 - 212) / 212] x 100
Subtract the new number by the original number
173 - 212 = -39
-39 ÷ 212 = -0.18396226415094338
-0.18396226415094338 x 100 = -18.4%