-70.44% is the change from 274 to 81
Calculation steps:
[( 81 - 274 ) ÷ 274] x 100 = -70.44%
Formula
Percentage change = [(81 - 274) / 274] x 100
Subtract the new number by the original number
81 - 274 = -193
-193 ÷ 274 = -0.7043795620437956
-0.7043795620437956 x 100 = -70.44%