-77.9% is the change from 439 to 97
Calculation steps:
[( 97 - 439 ) ÷ 439] x 100 = -77.9%
Formula
Percentage change = [(97 - 439) / 439] x 100
Subtract the new number by the original number
97 - 439 = -342
-342 ÷ 439 = -0.7790432801822323
-0.7790432801822323 x 100 = -77.9%