-97.87% is the change from 939 to 20
Calculation steps:
[( 20 - 939 ) ÷ 939] x 100 = -97.87%
Formula
Percentage change = [(20 - 939) / 939] x 100
Subtract the new number by the original number
20 - 939 = -919
-919 ÷ 939 = -0.9787007454739084
-0.9787007454739084 x 100 = -97.87%