-21.79% is the change from 280 to 219
Calculation steps:
[( 219 - 280 ) ÷ 280] x 100 = -21.79%
Formula
Percentage change = [(219 - 280) / 280] x 100
Subtract the new number by the original number
219 - 280 = -61
-61 ÷ 280 = -0.21785714285714286
-0.21785714285714286 x 100 = -21.79%