-61.63% is the change from 172 to 66
Calculation steps:
[( 66 - 172 ) ÷ 172] x 100 = -61.63%
Formula
Percentage change = [(66 - 172) / 172] x 100
Subtract the new number by the original number
66 - 172 = -106
-106 ÷ 172 = -0.6162790697674418
-0.6162790697674418 x 100 = -61.63%