-68.87% is the change from 212 to 66
Calculation steps:
[( 66 - 212 ) ÷ 212] x 100 = -68.87%
Formula
Percentage change = [(66 - 212) / 212] x 100
Subtract the new number by the original number
66 - 212 = -146
-146 ÷ 212 = -0.6886792452830188
-0.6886792452830188 x 100 = -68.87%