-78.86% is the change from 421 to 89
Calculation steps:
[( 89 - 421 ) ÷ 421] x 100 = -78.86%
Formula
Percentage change = [(89 - 421) / 421] x 100
Subtract the new number by the original number
89 - 421 = -332
-332 ÷ 421 = -0.7885985748218527
-0.7885985748218527 x 100 = -78.86%