-67.27% is the change from 666 to 218
Calculation steps:
[( 218 - 666 ) ÷ 666] x 100 = -67.27%
Formula
Percentage change = [(218 - 666) / 666] x 100
Subtract the new number by the original number
218 - 666 = -448
-448 ÷ 666 = -0.6726726726726727
-0.6726726726726727 x 100 = -67.27%