-22.86% is the change from 280 to 216
Calculation steps:
[( 216 - 280 ) ÷ 280] x 100 = -22.86%
Formula
Percentage change = [(216 - 280) / 280] x 100
Subtract the new number by the original number
216 - 280 = -64
-64 ÷ 280 = -0.22857142857142856
-0.22857142857142856 x 100 = -22.86%