-89.89% is the change from 277 to 28
Calculation steps:
[( 28 - 277 ) ÷ 277] x 100 = -89.89%
Formula
Percentage change = [(28 - 277) / 277] x 100
Subtract the new number by the original number
28 - 277 = -249
-249 ÷ 277 = -0.8989169675090253
-0.8989169675090253 x 100 = -89.89%