-92.77% is the change from 249 to 18
Calculation steps:
[( 18 - 249 ) ÷ 249] x 100 = -92.77%
Formula
Percentage change = [(18 - 249) / 249] x 100
Subtract the new number by the original number
18 - 249 = -231
-231 ÷ 249 = -0.927710843373494
-0.927710843373494 x 100 = -92.77%