-83.22% is the change from 423 to 71
Calculation steps:
[( 71 - 423 ) ÷ 423] x 100 = -83.22%
Formula
Percentage change = [(71 - 423) / 423] x 100
Subtract the new number by the original number
71 - 423 = -352
-352 ÷ 423 = -0.8321513002364066
-0.8321513002364066 x 100 = -83.22%