-69.53% is the change from 919 to 280
Calculation steps:
[( 280 - 919 ) ÷ 919] x 100 = -69.53%
Formula
Percentage change = [(280 - 919) / 919] x 100
Subtract the new number by the original number
280 - 919 = -639
-639 ÷ 919 = -0.6953210010881393
-0.6953210010881393 x 100 = -69.53%