-47.2% is the change from 820 to 433
Calculation steps:
[( 433 - 820 ) ÷ 820] x 100 = -47.2%
Formula
Percentage change = [(433 - 820) / 820] x 100
Subtract the new number by the original number
433 - 820 = -387
-387 ÷ 820 = -0.4719512195121951
-0.4719512195121951 x 100 = -47.2%