-84.19% is the change from 620 to 98
Calculation steps:
[( 98 - 620 ) ÷ 620] x 100 = -84.19%
Formula
Percentage change = [(98 - 620) / 620] x 100
Subtract the new number by the original number
98 - 620 = -522
-522 ÷ 620 = -0.8419354838709677
-0.8419354838709677 x 100 = -84.19%