-75.91% is the change from 274 to 66
Calculation steps:
[( 66 - 274 ) ÷ 274] x 100 = -75.91%
Formula
Percentage change = [(66 - 274) / 274] x 100
Subtract the new number by the original number
66 - 274 = -208
-208 ÷ 274 = -0.7591240875912408
-0.7591240875912408 x 100 = -75.91%