-93.5% is the change from 277 to 18
Calculation steps:
[( 18 - 277 ) ÷ 277] x 100 = -93.5%
Formula
Percentage change = [(18 - 277) / 277] x 100
Subtract the new number by the original number
18 - 277 = -259
-259 ÷ 277 = -0.9350180505415162
-0.9350180505415162 x 100 = -93.5%