-74.71% is the change from 261 to 66
Calculation steps:
[( 66 - 261 ) ÷ 261] x 100 = -74.71%
Formula
Percentage change = [(66 - 261) / 261] x 100
Subtract the new number by the original number
66 - 261 = -195
-195 ÷ 261 = -0.7471264367816092
-0.7471264367816092 x 100 = -74.71%