-97.78% is the change from 902 to 20
Calculation steps:
[( 20 - 902 ) ÷ 902] x 100 = -97.78%
Formula
Percentage change = [(20 - 902) / 902] x 100
Subtract the new number by the original number
20 - 902 = -882
-882 ÷ 902 = -0.9778270509977827
-0.9778270509977827 x 100 = -97.78%