-42% is the change from 819 to 475
Calculation steps:
[( 475 - 819 ) ÷ 819] x 100 = -42%
Formula
Percentage change = [(475 - 819) / 819] x 100
Subtract the new number by the original number
475 - 819 = -344
-344 ÷ 819 = -0.42002442002442003
-0.42002442002442003 x 100 = -42%