-81.5% is the change from 427 to 79
Calculation steps:
[( 79 - 427 ) ÷ 427] x 100 = -81.5%
Formula
Percentage change = [(79 - 427) / 427] x 100
Subtract the new number by the original number
79 - 427 = -348
-348 ÷ 427 = -0.8149882903981265
-0.8149882903981265 x 100 = -81.5%