-91.7% is the change from 277 to 23
Calculation steps:
[( 23 - 277 ) ÷ 277] x 100 = -91.7%
Formula
Percentage change = [(23 - 277) / 277] x 100
Subtract the new number by the original number
23 - 277 = -254
-254 ÷ 277 = -0.9169675090252708
-0.9169675090252708 x 100 = -91.7%