-81.73% is the change from 427 to 78
Calculation steps:
[( 78 - 427 ) ÷ 427] x 100 = -81.73%
Formula
Percentage change = [(78 - 427) / 427] x 100
Subtract the new number by the original number
78 - 427 = -349
-349 ÷ 427 = -0.8173302107728337
-0.8173302107728337 x 100 = -81.73%