-78.15% is the change from 421 to 92
Calculation steps:
[( 92 - 421 ) ÷ 421] x 100 = -78.15%
Formula
Percentage change = [(92 - 421) / 421] x 100
Subtract the new number by the original number
92 - 421 = -329
-329 ÷ 421 = -0.7814726840855107
-0.7814726840855107 x 100 = -78.15%