-78.79% is the change from 429 to 91
Calculation steps:
[( 91 - 429 ) ÷ 429] x 100 = -78.79%
Formula
Percentage change = [(91 - 429) / 429] x 100
Subtract the new number by the original number
91 - 429 = -338
-338 ÷ 429 = -0.7878787878787878
-0.7878787878787878 x 100 = -78.79%