-93.62% is the change from 235 to 15
Calculation steps:
[( 15 - 235 ) ÷ 235] x 100 = -93.62%
Formula
Percentage change = [(15 - 235) / 235] x 100
Subtract the new number by the original number
15 - 235 = -220
-220 ÷ 235 = -0.9361702127659575
-0.9361702127659575 x 100 = -93.62%