-25.86% is the change from 290 to 215
Calculation steps:
[( 215 - 290 ) ÷ 290] x 100 = -25.86%
Formula
Percentage change = [(215 - 290) / 290] x 100
Subtract the new number by the original number
215 - 290 = -75
-75 ÷ 290 = -0.25862068965517243
-0.25862068965517243 x 100 = -25.86%