-71.9% is the change from 274 to 77
Calculation steps:
[( 77 - 274 ) ÷ 274] x 100 = -71.9%
Formula
Percentage change = [(77 - 274) / 274] x 100
Subtract the new number by the original number
77 - 274 = -197
-197 ÷ 274 = -0.718978102189781
-0.718978102189781 x 100 = -71.9%