-80.44% is the change from 813 to 159
Calculation steps:
[( 159 - 813 ) ÷ 813] x 100 = -80.44%
Formula
Percentage change = [(159 - 813) / 813] x 100
Subtract the new number by the original number
159 - 813 = -654
-654 ÷ 813 = -0.8044280442804428
-0.8044280442804428 x 100 = -80.44%