-93.21% is the change from 280 to 19
Calculation steps:
[( 19 - 280 ) ÷ 280] x 100 = -93.21%
Formula
Percentage change = [(19 - 280) / 280] x 100
Subtract the new number by the original number
19 - 280 = -261
-261 ÷ 280 = -0.9321428571428572
-0.9321428571428572 x 100 = -93.21%