-78.96% is the change from 423 to 89
Calculation steps:
[( 89 - 423 ) ÷ 423] x 100 = -78.96%
Formula
Percentage change = [(89 - 423) / 423] x 100
Subtract the new number by the original number
89 - 423 = -334
-334 ÷ 423 = -0.789598108747045
-0.789598108747045 x 100 = -78.96%