-67.15% is the change from 277 to 91
Calculation steps:
[( 91 - 277 ) ÷ 277] x 100 = -67.15%
Formula
Percentage change = [(91 - 277) / 277] x 100
Subtract the new number by the original number
91 - 277 = -186
-186 ÷ 277 = -0.6714801444043321
-0.6714801444043321 x 100 = -67.15%