-66.75% is the change from 812 to 270
Calculation steps:
[( 270 - 812 ) ÷ 812] x 100 = -66.75%
Formula
Percentage change = [(270 - 812) / 812] x 100
Subtract the new number by the original number
270 - 812 = -542
-542 ÷ 812 = -0.6674876847290641
-0.6674876847290641 x 100 = -66.75%