-71.17% is the change from 666 to 192
Calculation steps:
[( 192 - 666 ) ÷ 666] x 100 = -71.17%
Formula
Percentage change = [(192 - 666) / 666] x 100
Subtract the new number by the original number
192 - 666 = -474
-474 ÷ 666 = -0.7117117117117117
-0.7117117117117117 x 100 = -71.17%