-98.35% is the change from 423 to 7
Calculation steps:
[( 7 - 423 ) ÷ 423] x 100 = -98.35%
Formula
Percentage change = [(7 - 423) / 423] x 100
Subtract the new number by the original number
7 - 423 = -416
-416 ÷ 423 = -0.983451536643026
-0.983451536643026 x 100 = -98.35%