-86.43% is the change from 280 to 38
Calculation steps:
[( 38 - 280 ) ÷ 280] x 100 = -86.43%
Formula
Percentage change = [(38 - 280) / 280] x 100
Subtract the new number by the original number
38 - 280 = -242
-242 ÷ 280 = -0.8642857142857143
-0.8642857142857143 x 100 = -86.43%