-95.36% is the change from 280 to 13
Calculation steps:
[( 13 - 280 ) ÷ 280] x 100 = -95.36%
Formula
Percentage change = [(13 - 280) / 280] x 100
Subtract the new number by the original number
13 - 280 = -267
-267 ÷ 280 = -0.9535714285714286
-0.9535714285714286 x 100 = -95.36%