-66.54% is the change from 819 to 274
Calculation steps:
[( 274 - 819 ) ÷ 819] x 100 = -66.54%
Formula
Percentage change = [(274 - 819) / 819] x 100
Subtract the new number by the original number
274 - 819 = -545
-545 ÷ 819 = -0.6654456654456654
-0.6654456654456654 x 100 = -66.54%