-70.45% is the change from 819 to 242
Calculation steps:
[( 242 - 819 ) ÷ 819] x 100 = -70.45%
Formula
Percentage change = [(242 - 819) / 819] x 100
Subtract the new number by the original number
242 - 819 = -577
-577 ÷ 819 = -0.7045177045177046
-0.7045177045177046 x 100 = -70.45%