-62.5% is the change from 280 to 105
Calculation steps:
[( 105 - 280 ) ÷ 280] x 100 = -62.5%
Formula
Percentage change = [(105 - 280) / 280] x 100
Subtract the new number by the original number
105 - 280 = -175
-175 ÷ 280 = -0.625
-0.625 x 100 = -62.5%