-69.72% is the change from 218 to 66
Calculation steps:
[( 66 - 218 ) ÷ 218] x 100 = -69.72%
Formula
Percentage change = [(66 - 218) / 218] x 100
Subtract the new number by the original number
66 - 218 = -152
-152 ÷ 218 = -0.6972477064220184
-0.6972477064220184 x 100 = -69.72%